Education Technology

# Activities

• ##### Subject Area

• Math: Algebra I: Linear Functions

9-12

60 Minutes

• ##### Device
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition

TI Connect™

• ##### Accessories

CBL™/CBL 2™
CBR™/CBR 2™
TI Connectivity Cable
Unit-to-Unit link cables

• ##### Other Materials
This is Activity 6 from the EXPLORATIONS Book:
Modeling Motion: High School Math Activities With The CBR

The following materials are required for this activity:
• Yard stick
• Masking tape

## Intersection

#### Activity Overview

In this activity, students will investigate modeling the motion of two people to find where they will meet and at what rate each was walking.

#### Before the Activity

• Connect the one calculator to one CBR 2™ unit
• Download the TI Connect™ software to analyze data on the computer
• See the attached PDF file for detailed instructions for this activity
• Print pages 27 - 32 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to your class.

Follow the Activity procedures:

• Run the Ranger program
• Collect data as two people walk toward each other and away from a wall
• Observe the distance versus time graphs
• Determine the slope and y-intercept for each line
• Use the sign of the slope to identify the direction of motion
• Find the velocity for each walker
• Enter the two equations in the slope-intercept form in the calculator and graph them
• Determine the point of intersection of the two lines
• #### After the Activity

Students will complete the Data Collection table and answer questions listed in it.

Review student results:

• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary