# Activities

• • • ##### Subject Area

• Math: Algebra I: Linear Functions

• ##### Author 9-12

60 Minutes

• ##### Device
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition
• ##### Other Materials
This is Activity 13 from the EXPLORATIONS Book:
Activities for Algebra with the TI-83 Plus.

The following materials are required for this activity:
• Climate data for different ecosystems
• Cold cup with ice water
• Hot cup with boiling water
• Rubber band
• Watch with a second hand
• Celsius and Fahrenheit thermometers

## Do You Have a Temperature? - TI-83

#### Activity Overview

In this activity, students represent and analyze climate data. They use linear regressions to understand the relationship between temperatures measured in the Fahrenheit and Celsius scales and examine conversion factors.

#### Before the Activity

• Set up the calculator for data collection using the procedure described in the attached Appendix PDF file
• See the attached PDF file for detailed instructions for this activity
• Print pages 169 - 187 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to your class.

• Place a Celsius and a Fahrenheit thermometer in hot water and record the temperature after every 10 seconds
• Place the thermometers in cold water and record the temperature after every 10 seconds
• Enter Celsius and Fahrenheit temperature data as lists
• Set up a scatter plot and model the data by graphing a line of best fit using linear regression
• Verify the equation for converting degree Celsius to degree Fahrenheit
• Reverse the data and repeat the steps to determine an equation for converting degrees Fahrenheit to degrees Celsius
• Enter the month wise breakdown of rainfall and temperature data for desert, tundra, and tropical forest ecosystems
• Plot rainfall versus temperature data
• Set up a box-and-whisker plot and find a linear regression to construct a climagraph
• Understand how rainfall and temperature differ in various ecosystems
• #### After the Activity

Students will complete the Data Collection and Analysis page and answer questions listed on it.

Review student results:

• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary