Question

Could someone help me with this please?

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

Enter the constant of variation for the quadratic variation equation.

y = ? x2

I think the answer is 2 but I'm not very sure

Answer 1

y = kx^2 where k is the constant of variation
if you plug in x = 6 and y = 72 into the above you can calculate k;-
72 = k * (6)^2

Answer 2

so 36k = 72

now divide both sides by 36

Answer 3

so what is the value of k?

Answer 4

72/36 would be 2 so would k = 2?

Answer 5

I agree with you @--Irwin