Education Technology

# Activities

• ##### Subject Area

• Math: Algebra I: Logarithmic Functions

9-12

45 Minutes

• ##### Device
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition

TI Connect™

• ##### Accessories

CBR™/CBR 2™
Sensor - Temperature
TI Connectivity Cable

• ##### Other Materials
Optional a cup of hot water and a second temperature Probe.
For more information on the Key Curriculum Press mathematics series visit them on the web at www.keypress.com

## Key Curriculum Press Advanced Algebra: Investigation Cooling

#### Activity Overview

This investigation is from Advanced Algebra Lesson 5.8: Applications of Logarithms from Chapter 5: Exponential, Power, and Logarithmic Functions. Students will find a relationship between temperature of a cooling object and time

#### Before the Activity

Review the Teacher Resources and Calculator Note PDF files.
Make copies of the Student Activity PDF file for your class.

#### During the Activity

Students will:

• Find a relationship between temperature of a cooling object and time
• Prove that the statements of equality are true

• Directions:
• Distribute the student activity sheets
• Follow the procedures as outlined
• #### After the Activity

As a class, review student answers, discussing questions that appeared to be more challenging, and re-teaching as needed.