The function with the domain {2, 3, 4} is the function y = 3x + 2, making the answer equal to A.
y = 3x + 2 y = 3(2) + 2y = 6 + 2y = 8
y = 3x + 2y = 3(3) + 2y = 9 + 2y = 11
y = 3x + 2y = 3(4) + 2y = 12 + 2y = 14
I notice that the range of the function y = 3x + 2 is {8, 11, 14}, making the answer equal to D.