# Activities

• • • ##### Subject Area

• Math: Algebra I: Linear Functions

• ##### Author 9-12

90 Minutes

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

TI Connect™

• ##### Accessories

TI Connectivity Cable

• ##### Other Materials
Appropriate measuring device if data is to be collected by students.

## Finding Linear Models

#### Activity Overview

Students graph a scatter plot, find average rate of change, develop a linear model, find a linear regression and a median/median line for a set of data graphed in a scatter plot, and predict profit.

#### Before the Activity

Students graph a scatter plot, find average rate of change, develop a linear model, find a linear regression and a median/median line for a set of data graphed in a scatter plot, and predict profit.

#### During the Activity

Part I. Enter data into lists, determine an appropriate window, and graph a scatter plot. Part II. Find average rate of change and intuitively develop a linear model for a set of data graphed in a scatter plot. Part III. Find a linear regression and a median/median line for a set of data graphed in a scatter plot. Use models to predict profit.