Answer:
D
Explanation:
Evaluate both points into each equation and see which works out..
A: f(1) = 4(3)^-1 = 4/3, it's supposed to be 12, so this equation is ruled out
B: f(1) = 3(4)^-1 = 3/4, ruled out for the same reason as A
C: f(1) = 3(4)^1 = 12, this works, now check the 2nd point...
f(2) = 3(4)² = 3(16) = 48, it's supposed to be 36, so this equation is ruled out
D: f(1) = 4(3)^1 = 12, this works, now check the 2nd point..
f(2) = 4(3)² = 4(9) = 36, this is what we wanted.