Question

The sketch below shows part graph with

the equation y = ab².
Work out the values of a and b.
*(-5, 96)
(-2, 12)
Y

Answer 1

12 = a(b^-2)

96 = a(b^-5)

1/8 = b³, so b = 1/2 and a = 3.

y = 3(1/2)^x