Question

Select the correct answer.

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

Answer 1

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

Explanation:

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

Answer 2

9514 1404 393

Answer:

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

Explanation:

Substitute the given values for x to see what the y-values are.

f(x) = 4x +9

f({-4, -2, 0, 2}) = 4{-4, -2, 0, 2} +9 = {-16, -8, 0, 8} +9

= {-7, 1, 9, 17} . . . . . matches choice D