Question

Variable y varies directly with x2, and y = 72 when x = 6.

Enter the constant of variation for the quadratic variation equation.

y = x2

Answer 1

there is no such a thing... very poor and silly wording I believe... anyway,

varies directly in your case should mean that it goes through the origin

Answer 2

y=kx^2
plug in y=72 and x=6 and tell me what you'll get for k. K is constant.

Answer 3

thanks