The function f (x) converts US dollars into Japanese Yen. What does the inverse function do? use 'U' for dollar and 'Y' for yen (capital letters)

If the function f (x) uses the dollar U to convert into yen Y, we can say that it is written as Y = f (U), meaning that the number of yen Y is a function of the number of dollars U.

The inverse function would swap the places of these variables, writing it is U = f (Y), meaning that we would need the number of yen Y as a given, to solve for the number of dollars U.