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 7 from the EXPLORATIONS Book:
Modeling Motion: High School Math Activities With The CBR

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

## Match This

#### Activity Overview

In this activity, students will match their motion to a given graph by moving back and forth in front of a CBR unit. They will then describe their movements by writing a piece-wise defined equation for the motion.

#### 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 33 - 37 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to your class.

• Run the Ranger program on the calculator
• Set the CBR on a table so that it is aimed at the waist or chest of the walker
• Place a piece of tape 0.5 meter from the CBR and then every 0.5 meter for 4 meters
• Walk back and forth in front of a CBR and observe the distance versus time graph displayed on the calculator
• Divide the graph into sections and record the coordinates of the first and the last points for each section
• Find the y-intercept of each line to determine the starting position
• Calculate the slope to find the velocity
• #### 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