Question

What is the range of the function f(x) = 3x − 12 for the domain {-2, 2}? A. {3, 12} B. {-6, -18} C. {6, 18} D. {12, 3}

Answer 1

the answer is b: {-6, -18}

Explanation:

Answer 2

{-18, -6}

Explanation:

Here there are only two inputs: {-2, 2}. There are only two outputs: {f(-2), f(2)}, which, in turn, can be written as {3(-2) - 12, 3(2) - 12}, or {-18, -6}. This corresponds to Answer B.