Question: At a distance of x feet from the beach, the price in dollars of a plot of land of area a square feet is f(a, x).
(a) What are the units of fa(a, x)?
(b) What does fa(1000, 300) = 3 mean in practical terms?
(c) What are the units of fx(a, x)?
(d) What does fx(1000, 300) = -2 mean in practical terms?
(e) Which is cheaper: 1005 square feet that are 305 feet from the beach or 998 square feet that are 295 feet from the beach? Justify your answer.