Use a graphing calculator or computer to determine which of the given viewing rectangles produces the most appropriate graph of the function f (x) = √8x – x2.
(a) [– 4, 4] by [– 4, 4]
(b) [– 5, 5] by [– 0, 100]
(c) [– 10, 10] by [– 10, 40]
(d) [– 2, 10] by [– 2, 6]