Activity Detail
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Activity Overview

Students take distance readings as they walk in front of a CBR™. They apply the properties of a linear function to develop a model for the motion and interpret the values used in the model. Students learn to graph scatter plots, calculate slope, and graph linear 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 41 - 48 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 and align it with the calf of the walker
  • Have the walker stand in front of the CBR, and record the distance of this position
  • Record this as the first event
  • Have the walker take a step and measure the distance again and record it as the next event
  • Take distance reading for at least 6 steps
  • Graph all the data points and trace the plot
  • Understand that Events is the independent variable and Distance is the dependent variable
  • Find the line of best fit
  • Find the coordinate of the points and calculate the slope and use it to plot the line
  • Recognize the fact that slope represents the change in distance per step taken
  • Adjust the Y-intercept till the line matches the data points
  • Perform a linear regression and find the equation of the line of best fit
  • Determine how far the walker would be from the CBR if 20 steps are taken

    		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

    		Other Downloads




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    Subject Area:
    Science : Science General : General
    Math : Algebra I : Linear Equations and Functions

    Author:
    Texas Instruments

    Level:
    9-12

    Activity Time:
    60 Minutes

    Device:
    TI-83 Plus Family, TI-84 Plus Family

    Apps:
    EasyData™

    Software:
    TI Connect™

    Accessories:
    CBR™/CBR 2™, TI Connectivity Cable, Unit-to-Unit link cables

    Other:
    This is Activity 6 from the EXPLORATIONS Book:
    EasyData Activities: Modeling Algebraic Functions with Data Collection Activities.

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