Let f(x) = x³ + 2x² + 7x - 11 and g(x) = 3f(x). Which of the following describes g as a
function of f and gives the correct rule?
A.) horizontal compression; g(x) = 3x³ + 6x² + 21x - 33

B.)horizontal stretch; g(x) = 27x3 + 18x² +21x - 11

C.)vertical stretch; g(x) = 3x3 + 6x² +21x - 33

D.)vertical compression; g(x) = 27x³ + 18x² + 21x - 11