Education Technology

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

TI Connect™

# Middle Grades Math: Move it

by Texas Instruments

#### Overview

In this activity, students investigate transformation, slides and scaling, of a triangle using lists. They will add, subtract and multiply numbers to the list and describe the changes that have occurred. Students are to make the connection between changing the x- or y-values and the transformation.

#### Key Steps

• In this activity, students will enter the coordinates of the vertices of a triangle into two lists. Then on the Home screen, they will add or subtract a number from one of the lists. Students will then view the graph of the original triangle and the transformed triangle, determining how the x-values changed and the triangle moved.

• In Problem 2, students will translate the y-values and observe the effect on the triangle. In Problem 3, students will multiply the x- and y-values by a scale factor and determine how the triangle changes.