Education Technology

Math TODAY for TI-Navigator™ System - Humidity Makes Air Feel Even Hotter Part I

Published on 06/09/2008

Activity Overview

Using data from the USA TODAY graphic "Humidity makes air feel hotter" students will explore linear functions to determine how well they model the relationship between air temperature and heat index. When the model has been determined students will use the model to make predictions about the heat index when given a specific temperature.

Before the Activity

If you are using the TI-Navigator System with the TI-73 you will need the attached .pdf file.

  • Setup your TI-Navigator™ System
  • Make sure you are familiar with the following functions: Send to Class, Collect from Class, Screen Capture, Quick Poll and Activity Center
  • Your students will need a TI-83 Plus or TI-84 Plus graphing calculator, either working in pairs or individually
  • Download the attached activity resource files from all three sections to your computer


  • Recommendations:
  • Multimedia Projector for sharing the Activity Center, Quick Polls and Screen Captures with your students
  • TI Keyboards for students to easily answer the LearningCheck™ assessment questions
  • During the Activity

    Students will:

  • Model real-world data with linear functions
  • Create scatterplots using real-world data
  • Compare data in graphical and numerical form
  • Analyze rate of change
  • Understand patterns, relations, and functions


  • Directions
  • Distribute the Student Edition PDF file to your class
  • Follow the activity procedures outlined in the Teacher document
  • You may use the Graphic PDF file to display a large image of the USA TODAY graphic during the activity
  • After the Activity

    Access your students' understanding by using Send to Class, LearningCheck™ App and Class Analysis.