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

CBR™/CBR 2™
TI Connectivity Cable

• ##### Other Materials
This is Activity 3 from the EXPLORATIONS Book:
Modeling Motion: High School Math Activities With The CBR

The following materials are required for this activity:
• Meter stick

## Walk This Walk

#### Activity Overview

In this activity, students use a motion detector to create Distance versus Time graphs. They experiment with various Distance-Time graphs and write mathematical descriptions of motion with constant velocity.

#### Before the Activity

• Connect the calculator to the CBR 2™
• Install the TI Connect™ software to analyze data on the computer
• See the attached PDF file for detailed instructions for this activity
• Print pages 11 - 15 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to your class.

• Run the Ranger program
• Walk back and forth in front of the motion detector and begin collecting data
• Observe the graph of distance versus time on the calculator screen
• Write the equation of the line in slope-intercept form and check whether it matches the collected data
• Find the y-intercept to determine the starting position of the walker
• Calculate the slope of the line and determine the velocity
• Identify the motion which creates a given graph
• #### 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