Education Technology

# Activities

## Math TODAY - Wildfire Deaths

#### Activity Overview

Students will be asked to use the "Wildfire deaths" data to determine a linear model. They will examine the effect an outlier has on the model and compare methods to determine the best model.

#### Before the Activity

If you are using the TI-Navigator™ System with the TI-73 Explorer™ you will need the attached .pdf file.
See the attached Teacher Edition PDF file for notes and guidelines for this activity. The Technology Guide PDF file includes step-by-step calculator instructions with screen shots. If you are using the TI-Navigator™ Classroom Learning System, see the TI-Navigator Basic Skills Guide PDF file for information on how the system can be integrated into your activity.

#### During the Activity

Students will:

• Create a scatter plot.
• Determine a linear equation using linear regression both with and without the outlier on the calculator.
• Determine a linear equation using median-median both with and without the outlier on the calculator.
• Compare the two sets of lines and determine which method is better when there is an outlier in the data set.

• Directions:
• Distribute the Student Edition PDF file to your class.
• Follow the activity procedures outlined in the student document.
• You may use the Transparency PDF file to display a large image of the USA TODAY® graphic during the activity.
• #### After the Activity

Distribute the assessment questions or send the attached LearningCheck™ assessment to your class to gauge student understanding of the concepts presented in the activity.