*x-value, independent variable*), performs some operation (

*equation*) on it, then spits out an output (

*y-value, dependent variable*).

The

*inverse*of a function is the**undo**button in the world of functions. It takes an output, performs an operation, and gives back the input that would have went into the original function machine.
There is a way to test whether two functions are the inverses of each other. It is actually a mathematical

*theorem*, which says:
We will use this information in the next two posts, which make up this series on inverse functions. In the first, we will discuss how to use the above

*theorem*to test whether two functions are the inverses of each other. In the second, we'll see how to find the inverse of a given function.
I hope you'll stay tuned!