Activity Detail
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Activity Overview

Students write rules for real world functions. They make a table to compare function values and graph linear functions on the coordinate plane.

Before the Activity

  • See the attached PDF file for detailed instructions for this activity
  • Print pages 40 - 45 from the attached PDF file for your class
  • Study the calculator keystrokes

    		•

    		During the Activity

    		Distribute the pages to the class.

    Follow the activity procedures:
  • Write function rules for each company's discount plan
  • Calculate the cost of buying 1 through 15 of CDs from each company
  • Tabulate the results
  • Plot a graph of Cost of CDs versus Number of CDs
  • Analyze the graph and determine which company has the best plan and under which condition

    		After the Activity

    		Students complete the Student Activity pages and answer questions.

  • 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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    view textbook alignment

    Subject Area:
    Math : Algebra I : Linear Equations and Functions
    Math : Middle Grades Math : Algebraic Thinking
    Math : PreAlgebra : Number Sense and Operations
    Math : PreAlgebra : Expressions
    Math : PreAlgebra : Linear Functions
    Math : Middle Grades Math : Problem Solving

    Author:
    Texas Instruments

    Level:
    5-8

    Activity Time:
    60 Minutes

    Device:
    TI-30X IIB, TI-30X IIS, TI-34 II Explorer Plus™

    Apps:
     

    Software:
     

    Accessories:
     

    Other:
    This is Activity 5 from the EXPLORATIONS Book:
    Math Investigations with the TI-30X IIS and TI-34 II: Activities for the Middle Grades

    The following materials are required for this activity:

  • Colored pencils, markers or crayons
  • Straight edge


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