# The Derivative as a Function

- Author:
- Joel Gardner

- Topic:
- Derivative

## What can you learn?

We are tracking the value of the slope of the tangent line of the blue function at point A.
As point A moves along the function, the value of the slope of the tangent line is shown in orange, and this value is also being traced by point B.
Point B creates the green function, which is the derivative of the original blue function.
The green function is a function which can give the value of the derivative of the blue function, at any point.