Subject: Power Functions, If the point (-3, 8) lies on the graph of a power function with an EVEN exponent which is it. a) 3, -8 b) -3, -8 c) 3,8 d) 8,-3

Question

 I am having a real hard time figuring out this one. I would very much appreicate it if you included steps.

Answer 1

(-3,8) on a power function

f(x) = ax^2

f(-3) = a(-3)^2 = 9a = 8, a = 8/9

f(x) = (8/9)(x)^2

option a) (3,8) as the sign of x doesn't change y