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.