Steve opens a bank account. The amount, in dollars, in the account z weeks after the account is opened can be modeled by function f. If Steve has 85,000 in the account 20 weeks after the account is opened, which Two of the following must be true?

A. F(20) = 5,000
B. F(5,000) = 20
C. In the xy-plane, point (20,5,00) is on the graph y = f(x)
D. In the xy-plane, point (5,00,20) is on the graph y = f (x)