Which of the following equations passes through the points (1,12) and (3,108)?

y = a×b^{x}

If x=1 y=12, 12 = ab

a = ;

If x=3 y=108, 108 = ab^{3}

108 = (

108 = 12b^{2}

9 = b^{2}

3 = b

a=4

So y = 4×3^{x}

The equations (B) is the correct answer.