Education Technology

# Activities

• ##### Subject Area

• Math: Algebra I: Quadratic Functions
• Math: Geometry: Transformational Geometry

9-12

60 Minutes

• ##### Device
• TI-83 Plus Family

TI Connect™

• ##### Accessories

CBR™/CBR 2™
TI Connectivity Cable

• ##### Other Materials
This is Activity 4 from the EXPLORATIONS Book:
A Hands-On Look at Algebra Functions: Activities for Transformation Graphing .

The following materials are needed for this activity:
• ##### Report an Issue

Exploring Quadratic Data with Transformation Graphing

#### Activity Overview

Students practice with the parameters of the vertex form of the parabola and their effect on the shape of the curve. They use this concept to find a quadratic model. They also use translation and dilation to change the general parabola.

#### Before the Activity

• Set up the Transformation Graphing Application and the CBL™/CBR™ Application on the calculator using the TI Connect™ software
• Connect the CBR 2™ to the calculator using the Unit-to-Unit link cable
• Run the Ranger program on the calculator
• See the attached PDF file for detailed instructions for this activity
• Print pages 30 - 38 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to your class.

• Release a ball beneath the CBR and collect data as it bounces
• Observe the distance versus time plot on the screen and store the data as lists in the calculator
• Set up a scatter plot and record the coordinates of the vertex
• Use the DRAW feature and sketch the axis of symmetry
• Select the Transformation Graphing application and enter the general vertex form of the quadratic function
• Enter estimates for the coefficients to get a best fit model for the data
• #### After the Activity

Students will complete the Student Worksheet and answer questions listed on it.

Review student results:

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