This nice idea for developing intuition fro the derivative as slope or instantaneous rate of change came from a student's program on the Khan CodeAcademy, via Sue Van Hattum. [br][url]https://www.khanacademy.org/computer-programming/derivative-intuition/2118157735[/url][br][br]I may have seen something similar from Marc Renault or Mike May.[br][br]Use the red points to match the red tangents to the slope of the function.[br]Use the green free point to try to trace the slope. (MUCH harder.)

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