# Lesson 7 Homework Practice Solving Proportions Using Cross

**03-12-18 Monday** – Lesson 8-1 Circumference – Read and work through pages 613 – 616 – Homework: pages 617-618, 1-14 all

Objective: Students will learn how to find the circumference of circles.

**03-13-18 Tuesday** – Lesson 8-2 Area of circles – read and work through pages 623 – 626 – Homework: pages 627 – 628, 1-19 all

Objective: Students will learn how to find the area of circles

**03-14-18 Wednesday** – Lesson 8-3 Area of Composite Figures – read and work through pages 631 – 634, Homework: pages 635 – 636, 1-10 all

Objective: Students will learn how to find the area of composite figures.

**03-15-18 Thursday** – Lesson 8-4 Volume of Prisms – read and work through pages 639 – 642 – Homework: pages 643 – 644, 1-6 all 5 point bonus to work number 8 and get it correct.

Objective: Students will learn how to find the volume of prisms

**03-16-18 Friday** - 8-5 Volume of Pyramids – read and work through pages 653 – 656 – Homework: pages 657 – 658, 1-10 all

Objective: Students will learn how to find the volume of pyramids.

03-05-18 Monday – Robot Activity 2: How Far and How Fast? Day 1 – No Homework

Objective: Students will practice: Measurement, Unit Conversions, Graphing / Analysis of Data, Percentages, and Rates.

03-06-18 Tuesday – Robot Activity 2: How Far and How Fast? Day 2 – No Homework

Objective: Students will practice: Measurement, Unit Conversions, Graphing / Analysis of Data, Percentages, and Rates.

03-07-18 Wednesday – Robot Activity 2: How Far and How Fast? Day 3 – No Homework

Objective: Students will practice: Measurement, Unit Conversions, Graphing / Analysis of Data, Percentages, and Rates.

03-08-18 Thursday – Robot Activity 2: How Far and How Fast? Day 4 – No Homework

03-09-18 Friday Robot Activity 2: How Far and How Fast? Day 5 and completion – Students should have all data collected and at least started to graph data.

Objective: Students will practice: Measurement, Unit Conversions, Graphing / Analysis of Data, Percentages, and Rates

02-26-18 Monday – Lesson 7-6 Cross Sections – Read and work through pages 593-596 – Homework: pages 597-598, 1-13 all

Objective: Students will learn to identify 2-dimensional cross sections of 3-dimensional figures.

02-27-18 Tuesday – Robot Initialization instructions and begin Activity 1:Basic Robot Movements – No Homework

Objective: Students will learn how to use ModKit programming skills for VEX Robots to initialize robots and learn about basic robot movements. Each student is required to learn how to initialize robots in the event that partners are absent.

02-28-18 Wednesday – Activity 1: Basic Robot Movements – No Homework

Objective: Students will learn how to integrate math skills as needed and get your VEX Robot to carry out basic movements programmed for it to perform.

03-01-18 Thursday – Continue toward completion of Activity 1: Basic Robot Movements – No Homework

Objective: Students will learn how to integrate math skills as needed and get your VEX Robot to carry out basic movements programmed for it to perform.

03-02-18 Friday - Complete Activity 1: Basic Robot Movements – No Homework

Objective: Students will learn how to integrate math skills as needed and get your VEX Robot to carry out basic movements programmed for it to perform.

Word of the week: argument – a reason or a set of reasons that something is valid or true

02-19-18 Monday – No School

Objective: President’s day holiday - observed.

02-20-18 Tuesday – Indiana Lesson Similar Triangles and Indirect Measurement – Read and work through pages IN25-IN28 – Homework: pages IN29-IN30, 1-12 all.

Objective: Students will learn how to solve problems involving similar triangles.

02-21-18 Wednesday – Lesson 7-4 Scale Drawings – Read and work through pages 575-578 – Homework: pages 579-580, 1-9 all.

Objective: Students will learn how to solve problems involving scale drawings.

O2-22-18 Thursday – Lesson 7-5 Draw 3-Dimensional Figures – Read and work through pages 585-588 – Homework: pages 589-590, 1-11 all.

Objective: Students will learn how to draw three-dimensional figures given the top, side, and front views.

02-23-18 Friday – Find Surface Area Using Nets and Volume of 3-Dimensional Figures Activity – No Homework

Objective: Students will learn how to find the surface area using nets and volume of three dimensional figures.

Word of the week: analogy – a similarity between two things, figuring out how things are related

02-12-18 Monday – Complete Basic Algebra Test – No Homework

Objective: Students will complete Basic Algebra Test to show mastery of concepts and skills learned – test is designed like ISTEP to also help prepare students for upcoming ISTEP.

02-13-18 Tuesday – Lesson 7-1 Classify Angles – Read and work through pages 535-538 – Homework: page 539-540, 1-17 all.

Objective: Students will learn to classify angles and identify vertical and adjacent angles.

02-14-18 Wednesday – Lesson 7-2 Complementary and Supplementary Angles – Read and work through pages 543-546 – Homework: pages 547-548, 1-15 all.

Objective: Students will learn to identify pairs of complementary and supplementary angles.

02-15-18 Thursday – Lesson 7-3 Triangles – Read and work through pages 555-558 – Homework: Pages 559-560, 1-14 all.

Objective: Students will learn how to identify and classify triangles and find missing angle measures.

02-16-18 Friday – No School

Objective: Scheduled day off.

Word of the Week: annotate – to add notes

02-05-18 Monday – Writing Equations/Inequalities practice and solve – Homework: worksheet

Objective: Students will practice writing equations/inequalities and solve them.

02-06-18 Tuesday – Acuity 2 – No Homework

Objective: Students will show mastery of concepts and skills learned to date.

02-07-18 Wednesday – Review of basic concepts and skills used when solving two-step equations and inequalities – No Homework

Objective: Students will review basic concepts and skills used when solving two-step equations and inequalities.

02-08-18 Thursday – Quizzes will be returned and errors corrected/discussed plus more test pre practice – Homework: Students are to study/review/look over any and all notes in preparation for the test.

Objective: Students will review concepts and skills for Friday’s test over equations and inequalities.

02-09-18 Friday – Test: Equations and Inequalities (Equivalent to chapter 5 and 6 in textbook) – No Homework

Objective: Students will show mastery of understanding how perform operations with equations and inequalities.

Word of the week: Excerpt – a shortened piece of writing; selection, passage, portion, section

01-29-18 Monday – Adding Like Terms Logic Puzzle – no Home Work

Objective: Students will work together in groups of three solving multi-step questions and using answers to solve a logic puzzle.

01-30-18 Tuesday – Solving Equations Step by Step and Check – Homework: Worksheet with 10 problems to show each step – Start in class - worth 84 points – Due Thursday 02-01-18

Objective: Students will solve and check equations following a step by step procedure.

01-31-18 Wednesday – MathLight Lesson 3.8 Solving Inequalities with guided notes – Homework: worksheet

Objective: Students will learn how to solve and graph inequalities.

02-01-18 Thursday –Homework completion and Step by Step plus Inequality practice – No Homework

Objective: Students will either finish homework from Tuesday/Wednesday and/or practice more with step by step equation solving and Inequalities.

02-02-18 Friday – MathLight Lessons 3.9 Writing Equations and 3.10 Writing Inequalities with guided notes. – No Homework

Objective: Students will learn how to write and solve equations and inequalities.

01-22-18 Monday – Two-Step Equations – More practice in class – no Home Work

Objective: Students will practice and finish solving two-step equations.

01-23-18 Tuesday – Like Terms Error Analysis – Homework: Like Terms puzzle worksheet.

Objective: Students will discover their own errors and correct them.

01-24-18 Wednesday – The Distributive Property Error Analysis – Homework: worksheet

Objective: Students will discover their own errors and correct them.

01-25-18 Thursday – More Practice with Solving Two-Step and Mulit-Step Equations – Homework: Study/Practice for quiz tomorrow (Friday 1/26/18).

Objective: Students will practice solving two-step and multi-step equations in preparation for quiz..

01-26-18 Friday – Quiz: Solving Equations – no homework

Objective: Students will show mastery of concepts and skills needed to solve equations.

Word of the week: **Point-Of-View**- The vantage point from which the story is told.

01-15-18 Monday – No School

Objective: Martin Luther King holiday - Observed

01-16-18 Tuesday – Daily focus, new seating chart, pass out second half of textbooks, etc.

Objective: Students will participate in restructuring for continued curriculum.

01-17-18 Wednesday – Like Terms – Video with guided notes - Homework: worksheet

Objective: Students will learn how to understand and combine like terms.

01-18-18 Thursday – The Distributive Property – Video with guided notes – Homework: worksheet

Objective: Students will learn what distribution is and how to perform the distributive property.

01-19-18 Friday – Two-Step Equations – Video with guided notes – no homework

Objective: Students will be introduced to solving two-step equations.

Word of the week: **Point-Of-View**- The vantage point from which the story is told.

Previous Word of the week: **Summarize** – To make a short statement of the main points of a passage – review condense.

01-08-18 Monday - Lesson 4-7 Convert Between Systems –More practice converting between systems – classwork, if not finished, becomes homework

Objective: Students will learn how to convert units of measure between the customary and the metric system.

01-09-18 Tuesday – Lesson 4-10 Roots - Read and work through pages IN7-IN10 – Homework: pages IN11-IN12, 1-21

Objective: Students will learn how to find square roots and cube roots.

01-10-18 Wednesday – Lesson 4-11 Compare Real Numbers – Read and work through pages IN17-IN20 – Homework – pages IN21-IN22, 1-15

Objective: Students will learn how to find square roots and cube roots.

01-11-18 Thursday – Quiz over Prime Factorization, converting between systems, Comparing Real Numbers, and roots.

Objective: Students will show mastery of concepts and skills learned.

01-12-18 Friday – Switch and check daily focus, new seating chart, pass out second half of textbooks.

Objective: Students will participate in restructuring for continued curriculum.This was moved to Tuesday 01-16-18 because of being off for a snow day.

Word of the week: Summarize – To make a short statement of the main points of a passage – review condense.

Previously: Theme – A universal idea the author is trying to get across – the main message.

01-01-18 Monday – No School

Objective: New Year’s Day

01-02-18 Tuesday – Lesson 4-9 Prime Factorization Read and work through pages IN1-IN4 - Homework: pages IN5-IN6, 1-20

Objective: Students will learn how to find the prime factorization of whole numbers using exponents.

01-03-18 Wednesday – Moby Max Mid-Year Placement Evaluation – No Homework.

Objective: Students will show growth of concepts and skills since the initial placement evaluation.

01-04-18 Thursday – Lesson 4-9 Prime Factorization – More practice with prime factorization in class – worksheet – finish for homework

Objective: Students will learn how to find the prime factorization of whole numbers using exponents.

01-05-18 Friday – Lesson 4-7 Convert Between Systems - Read and work through pages 319-322 - Homework: pages 323-324, 1-14.

Objective: Students will learn how to convert units of measure between the customary and the metric system.Due to the 2hr delays all week, this lesson was moved to Monday 1-8-18.

Word of the week: Theme – A universal idea the author is trying to get across – the main message.

12-11-17 Monday – Lesson 4-8 Divide Fractions - Read and work through pages 327-330 - Homework: pages 331-332, 1-11

Objective: Students will learn how to divide fractions and mixed numbers.

12-12-17 Tuesday – ‘Mad Lib’ review For Ch 4 Test over adding, subtracting, multiplying, and dividing positive/negative fractions and mixed numbers.

Objective: Students will practice basic operations with positive/negative fractions and mixed numbers.

12-13-17 Wednesday – Ch 4 Test (This is a partial test as there are four more lessons after winter break)

Objective: Students will show mastery of concepts and skills learned about comparing, ordering, and solving basic operations with fractions and mixed numbers.

12-14-17 Thursday – Christmas Activities that review operations with fractions (1^{st} period – 6^{th} grade will be doing a different activity designed by the 6^{th} grade team)

Objective: Students will practice operations with fractions.

12-15-17 Friday – Christmas Activities that review Order of Operations and/or working with formulas. (1^{st} period – 6^{th} grade will be doing a different activity designed by the 6^{th} grade team – team leader will be reading The Christmas Carol in the cafeteria.)

Objective: Students will review and practice order of operations and/or working with formulas.

Word of the week: Paraphrase – To make a short statement about the main points.

12-04-17 Monday – Lesson 4-4 Add and Subtract unlike Fractions - Read and work through pages 291-294 - Homework: pages 295-296, 1-14 (part of the homework will be done as the class lesson.)

Objective: Students will learn how to add and subtract fractions with unlike denominators.

12-05-17 Tuesday – Lesson 4-4 Add and Subtract unlike Fractions Activity- No Homework

Objective: Students will practice adding and subtracting fractions with unlike denominators.

12-06-17 Wednesday – Lesson 4-5 Add and Subtract Mixed Numbers- Read and work through pages 299-302 – Homework: pages 303-304, 1-16 (part of the homework will be done as the class lesson.)

Objective: Students will learn how to add and subtract mixed numbers.

12-07-17 Thursday – Lesson 4-5 Add and Subtract Mixed Numbers- Activity – No Homework

Objective: Students will practice adding and subtracting mixed numbers.

12-08-17 Friday – Lesson 4-6 Multiply Fractions- Read and work through pages 311-314 – Homework: pages 315-316, 1-16 (Do in class)

Objective: Students will learn how to multiply fractions and mixed numbers.

Word of the week: Distributive – An Algebra property used to multiply a single term and two or terms inside a set of parenthesis. (to apply)

Example: 5(x + 6) = 5(x) + 5(6)

= 5x + 30

11-27-17 Monday – Lesson 4-1 Terminating and Repeating Decimals – Read and work through pages 263 to 266 – Supplemental notes will be provided - Homework: pages 267-268, 1-18 Organized on a separate sheet of paper – Neatly write the problem, show work, and circle the answers. Due Wednesday 11-29-17 at the very beginning of class.

Objective: Students will learn how to write fractions as terminating or repeating decimals and write decimals as fractions.

11-28-17 Tuesday – Lesson 4-1 Terminating and Repeating Decimals Activity created by student helper Jaime Cuffle (Share with Deniese Herring and Karen Olsen) – No homework, but there still is Monday’s homework due tomorrow.

Objective: Students will practice how to write fractions as terminating or repeating decimals and write decimals as fractions.

11-29-17 Wednesday – Lesson 4-2 Compare and Order Rational Numbers – Watch “Math Light Video” with guided notes over classifying real numbers – Homework: Accompanying Math Light worksheet over classifying real numbers due tomorrow.

Objective: Students will learn how to compare and order rational numbers.

11-30-17 Thursday – Lesson 4-2 Compare and Order Rational Numbers – Read and work through pages 271 to 274 – Homework: pages 275-276, 1-11, Organized on a separate sheet of paper – Neatly write the problem, show work, and circle the answers.

Objective: Students will learn how to compare and order rational numbers.

12-01-17 Friday – Lesson 4-3 Add and Subtract Like Fractions – Read and work through pages 283 to 286 –

Classwork: pages 287 – 288, 1-10 and check. Becomes homework if student is absent.

Objective: Students will learn how to add and subtract rational numbers, expressed as like fractions.

Word of the week: Interpret – to describe what you have found out; Translate; Decode

11-13-17 Monday – Jeopardy Complete Integer Review – Homework: Begin studying for test over Chapter 3 – Integers on Wednesday 11/15/17

Objective: Students will review and practice integer operations and rules.

11-14-17 Tuesday – Integer Review Activity – Homework: Study for test over Chapter 3 Integers

Objective: Students will review and practice integer operations and rules.

11-15-17 Wednesday – Ch 3 Test – Integers – No Homework

Objective: Students will show mastery of concepts and skills learned in Ch 3 – Integers.

11-16-17 Thursday – Thanksgiving Math – Thanksgiving Sales Flyer/Craft Gala/Solve Percent Problems/Order of Operations – No Homework

Objective: Students will reinforce math skills on percentages, sales tax, and order of operations.

11-17-18 Friday – Budget Task Cards –– No Homework

Objective: Students will reinforce math skills on percentages with budget calculations.

Word of the Week: INTEGRATE – to put together or to combine.

11-06-17 Monday – Review Addition and Subtraction of Integers Jeopardy – No Homework

Objective: Students will practice and show adding and subtracting positive and negative integers.

11-07-17 Tuesday – Multiply Integers – Practice in class No Homework unless student is absent or doesn’t participate

Objective: Students will learn how to multiply Integers.

11-08-17 Wednesday – Divide Integers – Practice in class No Homework unless student is absent or doesn’t participate

Objective: Students will learn how to divide integers.

11-09-17 Thursday – Quiz over add/subtract/multiply/ divide integers – no homework

Objective: Students will show mastery of concepts and skills learned in Chapter 3 - Integers

11-10-17 Friday – No School

Objective: Veterans Day Holiday

Word of the week: Infer – to use information to make educated guesses based on prior knowledge – deduce, conclude

10-30-17 Monday – Subtraction of Integers Self Checking worksheet – No Homework unless absent.

Objective: Students will practice subtracting integers.

10-31-17 Tuesday – Review Test Chapter 2 – Percent – Practice working problems on a separate sheet of paper in class – Students who finish will work on Addition of integers self-checking worksheet – No Homework

Objective: Students will review concepts and skills learned in Chapter 2 – Percent.

11-01-17 Wednesday – Review Test Chapter 2 – Percent – Practice working problems on a separate sheet of paper in class – Students who finish will work on or finish Addition of integers self-checking worksheet – No Homework

Objective: Students will review concepts and skills learned in Chapter 2 – Percent.

11-02-17 Thursday – RE-TEST Ch 2 Percent – alternate test

Objective: Students will show mastery of concepts and skills learned in Chapter 2 – Percent.

11-03-17 Friday – MAYHEM! Adding and Subtracting Integer Activity – No Homework

Objective: Students will practice adding and subtracting integers.

10-23-17 Monday – Chapter 2 Review and Study Guide – Homework: Study for test

Objective: Students will review concepts and skills in preparation for the test over chapter 2 – percent.

10-24-17 Tuesday – Test Chapter 2 - Percent

Objective: Students show mastery of concepts and skills learned in Chapter 2 – Percent.

10-25-17 Wednesday – Lesson 3-1 Integers and Absolute Value – Read and work through pages 191–194 – Homework: Pages 195-196, 1-12, and page 197, 22-27

Objective: Students will learn to read and write integers, and find the absolute value of an integer.

10-26-17 Thursday – Lesson 3-2 Add Integers – Read and work through pages 203–206 – Homework: Pages 207 – 208, 1-12 and page 209, 21-27.

Objective: Students will learn how to add integers.

10-27-17 Friday – Lesson 3-3 Subtract Integers – Read and work through pages 215-218 – Classwork: Page 219, 1-12 (If absent, students will need to make this lesson up.)

Objective: Students will learn how to subtract integers.

Word of the week: Identify – to point out, discover, cite

10-16-17 Monday – No School

Objective: Fall Break

10-17-17 Tuesday – Lesson 2-6 Sales Tax, Tips, and Mark Ups – Read and work through pages 151-154, Homework: pages 155-156, 1-10 show work due Thursday 10-19-17

Objective: Students will learn how to solve problems involving financial literacy, such as sales tax, tips, and markup.

10-18-17 Wednesday – Acuity 1 – Library Computer Lab – No Homework

Objective: Students will show content mastery over lessons learned in the first grading period.

10-19-17 Thursday – Lesson 2-8 Financial Literacy: Simple Interest – Read and work through pages 167-170 – Homework: Pages 171-172, 1-10

Objective: Students will learn how to solve problems involving simple interest.

10-20-17 Friday – Discounts, Markups, and Sales Tax activity – “Who Killed Mr. Prop?” – No Homework

Objective: Students will review discounts, markups, and sales tax.

Word of the week: Evaluate – to find value, judge – Also, calculate or solve

10-09-17 Monday –Sales Tax, Tips, and Commission – Practice in class finding sales tax, tips, and commission – Homework: worksheet over class topics

Objective: Students will learn to solve problems involving financial literacy, such as sales tax, tips, and commission.

10-10-17 Tuesday – Simple Interest – Practice in class finding simple interest – Homework: worksheet over finding simple interest

Objective: Students will learn how to solve problems involving simple interest.

10-11-17 Wednesday – Percent of change and percent Error – Practice in class finding percent of change and percent error – homework: worksheet over percent of change and percent error.

Objective: Students will learn to solve problems involving percent of change and percent error.

10-12-17 Thursday – Percent Applications Quiz

Objective: Students will show mastery of concepts and skills learn about percent so far.

10-13-17 Friday – No School

Objective: Fall Break

Word of the week: Develop: To explain in greater detail, elaborate.

10-02-17 Monday – Lesson 2-4 The Percent Equation Day 2 – Review class work - Practice page 134, 14-17 – HW: pgs 135-136, 18-34 Finish for homework

Objective: Students will learn to solve problems involving percent by using the percent equation.

10-03-17 Tuesday – Review Homework – Students will work the problems on the Mid-Chapter Check on page 140, separate sheet of paper and turn in before the end of class.

Objective: Students will show mastery of concepts and skills learned in previous sections.

10-04-17 Wednesday – Lesson 2-5 Percent of Change Day 1– Read and work through pages 143-146 – Homework: pages 147-148, 1-13

Objective: Students will learn how to solve problems involving percent percent increase and percent decrease.

10-05-17 Thursday – Lesson 2-5 Percent of Change Day 2– Review homework – Practice pages 149-150, 17-30 in class. No homework unless student is absent.

Objective: Students will learn how to solve problems involving percent percent increase and percent decrease.

10-06-16 Friday – Lesson 2-6 Sales Tax, Tips, and Markups Day 1 – Read and work through pages 151-154 – Classwork: pages 155-156, no homework unless absent.

Objective: Students will learn to solve problems involving financial literacy, such as sales tax, tips, and markup.

Word of the week: Determine – To conclude or decide – to choose

09-25-17 Monday – Lesson 2-1 Percent of a Number – Read and work through pages 108 and 110 – Homework: page 109, 27 - 36

Objective: Students will learn to find the percent of a number.

09-26-17 Tuesday – Lesson 2-2 Percent and Estimation – Read and work through pages 111-114 – Homework: pages 115-116, 1-17

Objective: Students will learn to estimate the percent of a number.

09-27-17 Wednesday – Lesson 2-3 The Percent Proportion – Read and work through pages 121-124 – Homework: page 125-126, 1-13

Objective: Students will learn how to solve problems involving percent by using the percent proportion.

09-28-17 Thursday – Lesson 2-3 The Percent Proportion – Review homework – then finish problems 14-16 on page 126 and work problems 19-34 on pages 127-128 by starting in class and finishing for homework

Objective: Students will practice solving problems involving percent by using the percent proportion.

09-29-17 Friday – Lesson 2-4 The Percent Equation Day 1 – Read and work through pages 129-132 – Classwork: pages 133-134, 1-13

Objective: Students will learn to solve problems involving percent by using the percent equation.

Word of the Week: demonstrate – to describe or explain by examples

09-18-17 Monday – Proportional Relationships in tables, graphs and equations worksheet – no homework unless student is absent or this is not completed in class.

Objective: Students will practice finding proportional relationships.

09-19-17 Tuesday – Lesson 1-9 Direct Variation – Read and work through pages 81-84 – Homework: pages 85-86, 1-15

Objective: Students will use direct variation to solve problems.

09-20-17 Wednesday – Lesson 1-9 Direct Variation Day 2 – Read and work through pages 87 - 88 – Classwork: pages 87-88, 17-24

Objective: Students will use direct variation to solve problems.

09-21-17 Thursday – Test Chapter 1 Lessons 1-7 through1-9 – no homework

Objective: Students will show mastery of concepts and skills learned in lessons 1-7 through 1-9.

09-22-17 Friday – Lesson 2-1 Percent of a Number - Read and work through pages 103 – 107 in class – no homework

Objective: Students will learn how to find the percent of a number.

Word of the Week:

Associative: The associative property states that you can add or multiply regardless of how the numbers are grouped. By ‘grouped’, we mean ‘how you use parentheses’.

Example: 3 + 4 + 1 = 3 + 4 + 1

(3 + 4) + 1 = 3 + (4 + 1)

(7) + 1 = 3 + (5)

8 = 8

09-11-17 Monday – Lesson 1-7 Constant Rate of Change – Read and work through pages 65-68, Homework: pages 69-70, 1-9 start in class, finish for homework.

Objective: Students will learn to represent and identify constant rates of change.

09-12-17 Tuesday – Lesson 1-8 Slope - Read and work through pages 73-76 and pages 77-78 1-8 or as time allows - No homework

Objective: Students will learn how to identify slope using tables and graphs.

09-13-17 Wednesday Lesson 1-8 Slope Day 2 – Practice using the slope and one point to draw a line. No homework

Objective: Students will learn how to draw lines using the slope and one point.

09-14-17 Thursday - Lesson 1-8 Slope Day 3 – Practice finding the slope from a line on a graph. No homework

Objective: Students will learn how to find the slope from a graph of a line.

09-15-17 Friday - Lesson 1-8 Slope Day 4 – Practice finding the slope from a table. Then a short quiz on finding slope from table and graphs. No homework

Objective: Students show mastery of finding the slope using tables and graphs

Andretti the Yeti is worried. Why's he worried? Well, in two hours, he has a date with Nettie the Bodacious Yeti and it's just started to snow.

Snow? What's a little snow when you have a date with the love of your life? Well, Rule #5 of the Yeti Handbook states, if the snow is four feet deep, you can't be outside. Andretti doesn’t know if he'll be able to make it to her place.

The Yeti Weatherman reports the snow will fall at a constant rate of one foot of snow per half hour for the next several hours. Nettie is expecting him in 2 hours. In two hours, will the height of the snow be less than four feet?

### Setting up a Proportion or two equal Ratios

Let’s help him figure this out! We can set up a **proportion**, also known as **two equal ratios**. Ratios compare quantities. When you **set up a proportion**, the **numerators** and **denominators** of each ratio must contain the same variable.

Our proportion will contain ratios comparing the amount of snow in feet per hour. Let's look at the given information. We know it's snowing one foot per half hour. How deep will the snow be in two hours?

### Solving Example Proportion

Andretti the Yeti has an idea of how to solve this problem. He left us a hint in the snow. To solve for the unknown quantity of snow, we'll use **cross multiplication**, also known as **cross product**.

Don't confuse cross multiplication with **cross cancellation**. You use cross cancellation to make multiplying fractions easier.

Set the two cross products equal to each other. 1 · 2 = 2 and 0.5 · f = 0.5f. We are left with 2 = 0.5f.

To solve, divide both sides by 0.5. f = 4. At this rate, in two hours the snow will be four feet deep. Oh no! That won't work. What should Andretti do?

### Example Proportion 2

He should then plan to arrive earlier for his date! He doesn't want to break the Yeti rule, so he needs to get there before the snow is 4 feet deep. In how many hours will the snow be only three and one-half feet deep?

Using the same ratio, let’s set up another proportion, this time to solve for the unknown quantity of hours. We will solve this proportion just like we did before, using **cross multiplication**.

h = 0.5 · 3.5. To get to Nettie’s place before the snow is too deep, Andretti should plan to meet with her in 1.75 hours, or an hour and three-quarters. He needs to leave fifteen minutes earlier than originally planned.

Nettie is finally ready for their date. Poor Andretti, he followed Yeti Rule number 7 and waited outside of her house since he was too early.

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