Final answer:
The derivative of a function measures the rate of change of the function. It can be found using rules of differentiation, such as the power rule and the chain rule.
Step-by-step explanation:
The derivative of a function measures the rate at which the function is changing at any given point. To find the derivative of a function, you can use the rules of differentiation, such as the power rule and the chain rule. Let's say you have a function f(x) = x^2. The derivative of this function would be f'(x) = 2x.