# Derivative of a Constant Function

## Why does this work?

Can you give a geometric argument why this derivative rule is true?

## Antiderivative Rule

Where C is any real number constant.
Reverse the derivative rule to get the antiderivative rule.

Can you give a geometric argument why this derivative rule is true?

Where C is any real number constant.
Reverse the derivative rule to get the antiderivative rule.