Education Technology

Walking the Line

Subject Area
Math: Algebra I: Linear Functions
Level
9-12
Activity Time
60 Minutes
TI Calculator
TI-30X IIS
Other Materials
    This is Activity 4 from the EXPLORATIONS Book:
    Math Investigations with the TI-30X IIS: Activities for Secondary Mathematics

    The following material is required for this activity:
  • Coordinate graph paper
Resource Types
Lessons

Walking the Line

Activity Overview

Students use linear functions to model and solve problems in situations with slope and a constant rate of change. They learn to represent situations with variables in expressions, equations, and inequalities and use tables and graphs as tools to interpret them.

Before the Activity

  • See the attached PDF file for detailed instructions for this activity
  • Print pages 38 - 42 from the attached PDF file for your class
  • During the Activity

    Distribute the pages to the class.

    Follow the activity procedures:

  • Given the coordinates of two points, use the slope formula to find the slope of the line passing through the two points
  • Change the decimal result to a fraction


  • For each given ordered pair of numbers, plot the points, draw a line through the points, and find the slope of the line
  • Solve a real world problem and understand the meaning of the slope in the given situation


  • Make a plot of the data pairs from the given problem, draw a line through the pairs, and use the linear model to predict results


  • Write an equation to model given data, use the equation to generate several data pairs, plot the points, and find answers
  • After the Activity

    Students complete the Student Activity pages.

  • Review student results
  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary
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    Download Files
    Subject Area
    Math: Algebra I: Linear Functions
    Level
    9-12
    Activity Time
    60 Minutes
    TI Calculator
    TI-30X IIS
    Other Materials
      This is Activity 4 from the EXPLORATIONS Book:
      Math Investigations with the TI-30X IIS: Activities for Secondary Mathematics

      The following material is required for this activity:
    • Coordinate graph paper
    Resource Types
    Lessons
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