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 5 from the EXPLORATIONS Book:
EasyData Activities: Modeling Algebraic Functions with Data Collection Activities.

## Match the Graph

#### Activity Overview

Students walk in front of a calculator-based ranger CBR™ and try to match a distance-time graph. They examine the rate of change, and analyze and interpret the graph of a function.

#### Before the Activity

• Use TI Connect™ to download Vernier EasyData™ application
• Connect the calculator to the CBR 2™
• See the attached PDF file for detailed instructions for this activity
• Print pages 35 - 39 from the attached PDF file for the class
• Set up the calculator for data collection
• #### During the Activity

Distribute the pages to the class.

Follow the Activity procedures:

• Position the CBR in such a way that the person walking in front of it and the calculator screen are clearly visible
• Study the graph that has to be matched, and understand that time is the independent variable and distance is the dependent variable
• Observe that as the walker begins to move, a trace of his path is displayed in real time along with the original graph
• Ensure that the student positions herself and walks to match the starting point, direction, rate, deviation, and end point on the graph
• Recognize the fact that when the walker stands still, the line is flat and the slope is zero
• Determine the direction in which the walker should move to generate a line that slopes up (and down )
• #### After the Activity

• Students analyze the results and answer the case analysis questions on the student worksheet.
• Review student results
• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary