What is the range of change of the function f (x) = 3x-12 for the domain (-2,2) ?

The range is simply the output.

This is asking for to find the range of values for between x = - 2 and for x = 2

f (x) = 3x - 12

for x = - 2, f (-2) = 3 * (-2) - 12 = - 6 - 12 = - 18

for x = 2, f (2) = 3 * (2) - 12 = 6 - 12 = - 6

Therefore range of values for f (x) is between - 18 and - 6

Range is: (-18, - 6)