Question

The range of the function f(x) = x + 5 is {7, 9}. What is the function’s domain?

A.{2, 4}
B.{-2, -4}
C.{12, 14}
D.{-12, -14}
E.{0, 5}

Answer 1

range = y values

domain = x values

Plug 7 for y

7 = x + 5

Solve for x

2 = x

Plug 9 for y

9 = x + 5

Solve for x

4 = x

Domain {2, 4}