Activity Overview
This activity teaches students the relationship between the slope, y-intercept, and the equation of a line.
Before the Activity
Install the Cabri™: Jr. App on the students' graphing calculators 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 1 - 13 from the attached PDF file for your class
During the Activity
Distribute the pages to the class.
Follow the Activity procedures:
Plot a point in the first quadrant and display its coordinates
Plot a point on the Y-axis and display its coordinates
Draw a line connecting these two points and display its equation
Display the slope of the line
Drag the point in the first quadrant and observe the change in the equation of the line
Drag the y-intercept along the y-axis and observe the effect on the equation of the line
Make conjectures about the slope and y-intercept
After the Activity
Review student results:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary