When the organizers of a bake sale sell brownies for \$ 1.50 each, they sell 7 brownies every hour. When the brownies are sold for \$2.00 each, 5 brownies are sold each hour. If \(x\) is the price per brownie in dollars, and \(f\) is the number of brownies sold per hour, then which of the following could represent \(f\) as a function of \(x\)?
(A)\(f(x) = 4x + 1\) (B)\(f(x) = 6 x- 7\) (C)\(f(x) = -3x + 11\) (D)\(f(x) = -4x + 13\) (E)\(f(x) = -6x + l6\)
D