If f (x) is a one-to-one function and f (8) = -2 then which of the following points must lie on the graph of its inverse, i. e. y = f-1 (x)?

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be bale to prepare using the sauce?