# Activities

• • • ##### Subject Area

• Math: Algebra I: Equations and Inequalities

• ##### Author 9-12

60 Minutes

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

TI Connect™

• ##### Accessories

TI Connectivity Cable

• ##### Other Materials
This is Activity 1 from the EXPLORATIONS Book:
Exploring Mathematics with the Inequality Graphing Application

## Winning Inequalities (Part 1)

#### Activity Overview

Students write and interpret a linear equation and an inequality with two variables and use the Inequality Graphing Application to map inequalities on a coordinate plane.

#### Before the Activity

Install the Inequality Graphing Application on the calculator using one of these two methods:

• TI Connect™, a TI Connectivity Cable, and the Unit-to-Unit Link Cable
• TI-Navigator™ "send to class" feature

See the attached PDF file for detailed instructions for this activity
Print pages 1-10 from the attached PDF file for your class

#### During the Activity

Distribute the pages to the class.

• Assign x to represent the number of 2-point field goals scored and y to represent the number of 3-point field goals scored
• Write a linear equation for the problem with two variables
• Rewrite the equation in slope-intercept form
• Graph the equation
• Record the ordered pairs that are possible solutions of the equation
• Rewrite the equation as an inequality (with the new condition)
• Use the Inequality Graphing application to graph the inequality
• Verify algebraically whether the points in the shaded region satisfy the inequality

#### After the Activity

Students will complete the Student Worksheet and answer questions.

Review student results:

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