Answer:
{-6, -12, -9} is the range
Explanation:
f(3) = 3 - 9 = -6
f(-3) = -3 - 9 = -12
f(0) = 0 - 9 = -9
f(3) = -6
f(-3) = -12
f(0) = -9
Substitute each number for x.
f(0 ) = 0 - 9 = -9
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