##### This *Where's the Point? Follow-Up* lesson plan also includes:

Ninth graders explore the graphs of vertical and horizontal lines. For this Algebra I lesson, 9th graders investigate the Cartesian plane and discover that all vertical lines have equations of the form x=k and all horizontal lines have equations of the form y=k. This lesson, which requires abTI-nspire handheld, is an introduction to the concept of graphing an equation.

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