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Phone Plan Comparison

Phone Plan Comparison
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2014-11-26 00:29
FunctionCoordinate GeometryGraphing
This example uses graphical representation to compare two phone plans, involving the plotting of linear equations. It utilizes the Intersect and Polygon commands, suitable for middle school and above students to learn solving systems of linear equations graphically.

GeoGebra Commands & Parameters

  1. Intersect(c, d) → A
  2. Polygon((x(A), y(A) + 1), (x(A) + 10, y(A) + 1), (x(A) + 10, y(A) - 1), (x(A), y(A) - 1)) → underLabel, b, e, f, g