Education Technology

# Activities

• ##### Subject Area

• Math: Algebra I: Linear Functions

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 6 from the EXPLORATIONS Book:
Topics In Algebra 1.

## Linear Functions: Slope with Grid

#### Activity Overview

Students learn to impose a grid on a line to quantify the steepness of a line. They learn that slope is the ratio of vertical change divided by the horizontal change. They also learn that lines can have slope that are positive, zero, negative, or undefined. Students also observe that the slope of a straight line is a constant.

#### Before the Activity

Install Topics in Algebra 1 (Chapters 1-4) App on the calculator using one of these two methods:

• TI Connect™, TI Connectivity Cable, and Unit-to-Unit Link Cable
• TI-Navigator™  "send to class" feature
• See the attached PDF file for detailed instructions for this activity
• Print pages 3-1 to 3-5 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

• Observe straight lines with different slopes and note that every line has a constant slope
• Use a grid to find the slope of a line between two points, and select the correct answer from the given options
• Link two calculators and use a grid to determine the slope of the line segments as quickly as possible
• Use the calculator and the coordinates of points on a line to graph the line
• Find the slope of the line