Question

y varies directly as the square of x. when x=5, y=5. find y when x=10

Answer 1

y=10
y=20
y=50
y=100

Answer 2

Directly! I thought inversely lol sorry...

y=k(x^2)
5=k(5^2)
5=k(25)
k=1/5

y=k(x^2)
y=1/5(10^2)
y=1/5(100)
y=20

=D