# Derivative as a Function

- Author:
- Dr. Doug Davis, 3D

- Topic:
- Derivative

The line tangent to a curve at a point is shown along with the derivative for several functions. To change functions click the "Next" button. Move the point on the -axis or click the play button. As the point is moved a dot of the derivative at that point is shown on the lower graph.
Selecting "Show as function" will display all points of the derivative as a curve and the derivative function.

Look at each function and move to see that the derivative of a function is also a function.