Question

If f(x) varies directly with x2, and f(x) = 96 when x = 4, find the value of f(2).

192
72
32
24

Answer 1

f(x) varies directly with x2 means f(x) = a*x2. You also got f(4)=a*4^2=16a=96
So a=6 therefore f(2) = a*2^2 = 6*4 = 24

Answer 2

thanks :)

Answer 3

welcome !