# Activities

• • • ##### Subject Area

• Math: Algebra I: Linear Functions

• ##### Author 9-12

60 Minutes

• ##### Device
• TI-73 Explorer™
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition

TI Connect™

• ##### Accessories

TI Connectivity Cable

• ##### Other Materials
This is Activity 8 from the EXPLORATIONS Book:
Topics In Algebra 1.
• ##### Report an Issue

Linear Functions: Slope as Rate of Change

#### Activity Overview

Students learn to associate the slope of a straight line with a constant rate of change. They also learn to calculate the rate of change from data points on a line, using the correct units. Students also learn to read from a linear graph: the rate of change, the scale of the axes, and the correct units.

#### Before the Activity

Install Topics in Algebra 1 (Chapters 1-4) App on the calculator using one of these two methods:

• TI Connect™, a TI Connectivity Cable, and the Unit-to-Unit Link Cable
• TI-Navigator™  "send to class" feature
• See the attached PDF file for detailed instructions for this activity
• Print pages 3-18 to 3-23 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

• Determine what type of graphs have non-constant rate of change
• Simulate a trip in the balloon in the activity Balloon Speed and record time and position data
• Calculate the rate of change of each trip
• Simulate a dive in the submarine in the activity Dive and record time and position data
• Calculate the rate of change of each trip
• In the Car Trip Word Problem, find the rate at which the car travels for each leg of the trip
• Given a set of coordinates, find the rate of change using ratio formula change in y to change in x
• Use the calculator to convert find rate of change for data given in different units