Question

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

Answer 1

y = kx^2
when y=5 and x=5
5=k*25
k=1/5

when x=10
y=1/5 * 10 = 2

Answer 2

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

Answer 3

sorry when x=10
y=1/5 * 100
y=20