You can enter your function, or choose one from the menu, in the first row, and choose scale for the diagram in the next rows. Moving the slider will move the tangent line across the diagram. With first and or second derivative selected, you will see curves and values of these derivatives of your function, along with the curve defined by your function itself. Press ‘plot function’ whenever you change your input function.
The derivative of your function is the slope of the moving tangent line.

This tool uses JQWidgets extensively. Please verify their copyright.

Developed by Daniel Kleitman and Jean-Michel Claus.