What function represents the amount of change given from a $10 bill, f (x), based on x, the number of bagels purchased?

We are asked to form a function that would represent the amount of change given that the total money is $10 bill. Let this expression be f (x) where x represents the number of bagels being purchased. To solve this, we need to assign "P" to represent the price of bagel per piece. Then, we have the function below:

f (x) = $10 - xP

This is the answer to the problem f (x) = $10 - xP.