Question

I'm a bit confused... can someone help explain this to me? I will medal and fan (if I'm already a fan I will still medal).

Write the quadratic variation equation. y varies directly with x^2 and y=15 when x=3

Answer 1

y = kx^2, where k is any constant
y=15; x=3

15 = k(3)^2
15=9k
k=15/9

y= 15x^2 / 9
y= 5x^2 / 3

Hope this helps! =)

Answer 2

y = k(x^2)
9 = 6^2k
9 = 36 k
k = 9/36 or 1/4
So, the equation is y = (1/4)x^2

Answer 3

Thank-you Both! @kittenlover731 & @Agl202

Answer 4

Anytime : )