Education Technology

# Activities

• ##### Subject Area

• Math: Precalculus: Trigonometry (Triangle and Circular Functions)

9-12

35 Minutes

• ##### Device
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition
• TI-84 Plus C Silver Edition
• TI-84 Plus CE
• ##### Software

TI Connect™
TI Connect™ CE

## Find That Sine

#### Activity Overview

Sinusoidal regression is used to determine equations to model various data sets and the equations are used to make inferences.

#### Key Steps

• Students explore sinusoidal regression by determining and graphing the sine regression equation.

Students will use the program KANSTEMP which will load six lists with data for all three problems.

• They use data for the average monthly temperature for Kansas City to determine the sine equation that models the data.

Students produce a scatter plot with the data given to them in their spreadsheet and find the sine equation that models the data.

• In Problem 2, students will then find the minimum and maximum points on the curve for four dates. These points will represent the summer and winter solstices.