Activity Overview
Students explore the equations of lines written in the form: y = mx + b. They move points defining the lines, and view the related changes in the parameters of the equations.
NCTM Geometry Standard: Specify locations and describe spatial relationships using coordinate geometry and other representational systems.
Before the Activity
Install the Cabri™ Jr. App on the students' graphing calculators using TI Connect™, a TI Connectivity Cable, and the Unit-to-Unit Link Cable
Set up the
TI-Navigator™ system
See the attached PDF file for detailed instructions for this activity
Print pages 48 - 49 from the attached PDF file for your class
During the Activity
Distribute the pages to your class.
Follow the Activity procedures:
Draw a line and find its equation
Move the points defining the line and observe the changes in the equation
Draw another line and observe changes in its equation
TI-Navigator activity:
Have students submit equations with certain characteristics (specific slope, parallel to a
given line, with the same y-intercept as a given line)
After the Activity
Review student results
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary