Question

Determine the domain of the function f(x) = 2x - 4 when the range is {0, 12, 20}.
Question 11 options:



{2, 8, 12}



{0, 12, 20}



{4, 16, 24}



none of these

Answer 1

Your answer is {2, 8, 12}. The way you get this answer is by setting the function 2x - 4 equal to 0, 12, and 20 and solve for x. Your x-values become 2, 8, and 12