# The Derivative Function

In section 11.3, we learned how to find the derivative of a function at a specific point. In this section, we define and show how to find the derivative function *f* ′(*x*). Using this function, we can find the slope of the tangent line or the instantaneous rate of change at any *x* value.

**Read **in Section 11.4

- What is a derivative function?
- What is a derivative function?
- What are the derivatives of some basic functions (linear, polynomial, power, exponential, and logarithmic)?

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