Derivation of the Derivative

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To reset, click the top-right corner.

The function f can be changed to anything you like! Just type f(x)= ... into the input bar at the bottom.

The point A can be moved by clicking and dragging. Or, in the input bar, you can type in A=(x, f(x)) for whatever value of x you like. But then, it might not drag anymore; reset the construction.

The point B is determined by A and delta-x. Use the red slider to change delta-x. To find a particular value, type delta-x=... into the input bar at the bottom. You can get the delta character by clicking the far-right side of the input bar.

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Tim Cieplowski, October 6, 2011, Created with GeoGebra