which function has an inverse that is also a function?

The function that has an inverse function is{(-4,6), (-2,2), (4,2), (11,21).
An inverse function refer to a function which alter or cause changes to other function given.
Therefore, The function that has an inverse function is{(-4,6), (-2,2), (4,2), (11,21).
Learn more about inverse function below.
https://brainly.com/question/3831584
#SPJ6