h(x) = ax - 2
Since h(3) = 4h(2), we have 3a - 2 = 4(2a - 2)
3a - 2 = 8a - 8
5a = 6
a = 6/5
So, h(3) = (6/5)(3) - 2 = 18/5 - 2 = 8/5