# Activities

• • • ##### Subject Area

• Math: Algebra I: Linear Functions

• ##### Author 9-12

60 Minutes

• ##### Device
• TI-73 Explorer™
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition

TI Connect™

• ##### Accessories

TI Connectivity Cable

• ##### Other Materials
This is Activity 13 from the EXPLORATIONS Book:
Topics In Algebra 1.

## Linear Systems: Using Algebra

#### Activity Overview

Students learn to solve a system of linear equations (2 equations with 2 variables) by substitution and elimination methods. They also review the definitions of consistent (independent and dependent) and inconsistent systems, and associate the number of solutions of a system with them.

#### Before the Activity

Install Topics in Algebra 1 App 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 5-15 to 5-28 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

• Find the solution of each system using either the substitution or elimination method
• For a system of equations use substitution method to solve the equations
• In the activity What am I? solve the given system of equations by elimination method
• Observe the system of equations, and decide if the system is consistent and independent, consistent and dependent, or inconsistent
• Answer questions related to a given system of linear equations
• In the Balloon Ride activity use the substitution and elimination method to solve the system of equations
• Write a system of equations for the given word problems, define the variables and solve using substitution or elimination
• Use the calculator to graph two lines of a system of equations
• Use the intersect feature and find the solution
• #### After the Activity

Students will complete the Student Worksheet and analyze the results.

Review student results:

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