Question

What is the range of the function f(x) = 4x + 9, given the domain D = {-4, -2, 0, 2}?

A.
R = {-7, -1, 9, 17}
B.
R = {-17, -9, -1, 17}
C.
R = {-7, 1, 9, 17}
D.
R = {1, 7, 9, 17}

Answer 1

Hello :

Answer :C

Because :

f ( - 4 ) = 4(-4)+9 = -16 +9 = -7

f ( - 2 ) = 4(-2)+9 = - 8 +9 = 1

f (0 ) = 4(0)+9 = 9

f ( 2 ) = 4(2)+9 = 17