• Unit Overview

  • Letter Home
  • Unit Preparation
  • Mathematics in this Unit
  • Assessment in this Unit
  • Key Assessment Opportunities Chart
• Daily Practice and Problems
• Home Practice

• Lesson 1

  • Part 1: Predictions from Graphs
  • Part 2: Using Best-Fit Lines and Making Predictions
  • Summarizing the Lesson
  • Homework and Practice
  • Extension
  • Resources
  • Answer Keys

• Lesson 2

  • Part 1: Using Connecting Cubes to Explore Averages
  • Part 2: Using Cubes to Solve Problems
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 3

  • Part 1: Finding the Mean Head Circumference
  • Part 2: Using a Calculator to Find the Mean
  • Part 3: Targeted Practice
  • Summarizing the Lesson
  • Homework and Practice
  • Extension
  • Answer Keys

• Lesson 4

  • Part 1: Defining the Variables and Drawing the Picture
  • Part 2: Collecting and Recording the Data
  • Part 3: Graphing the Data
  • Part 4: Exploring the Data
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 5

  • Before the Lesson
  • Part 1: Two Heads Are Better Than One
  • Part 2: Workshop
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 6

  • Part 1: Function Machines
  • Part 2: Function Tables
  • Part 3: Guess My Rule
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 7

  • Part 1: Introducing and Solving the Problem
  • Part 2: Reviewing Student Work
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

Lesson 4

Bouncing Ball

Est. Class Sessions: 4–5

Daily Practice and Problems

X

Teacher Notes

X

TIMS Challenge

This can be a Problem of the Week.

A.

B–C.

Best-fit lines will vary.

D.

1993. Answers will vary. Students may say that because of the 1993 point, they didn't draw the line as steeply as they would have otherwise.

E.

Responses will vary. The 2009 price should fall on or close to the line.

N. Buying a New Car

The table shows the price of the same model of a new car from 1985 to 1995.

1. Round each price to the nearest $500. Fill in the ordered pairs.
2. Use the rounded numbers to make a point graph of the data on a piece of Centimeter Graph Paper.
3. Use a ruler to draw a best-fit line.
4. In which year did the price of this car model not go up? Did this data point change how you drew your best-fit line? If so, how did it change it? Write your answers on a separate sheet of paper.
5. The price of the same model car in 2009 is $15,505. Does this price fall on the best-fit line you drew? If it is not on your line, is it close?