## Parabolic secants

Twelfth graders explore parabolas. In this calculus lesson, 12th graders investigate the relationship between the slope of the secant line and the slope of the tangent line to the parabola at the point whose x-coordinate is the average of the x-coordinates of the points on the secant line. Students use the symbolic capacity of the TI-89 to explore the formal proof.

12th
Math
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