Question

If y varies directly as the X^2 and y = 200 when x = 5, what is the value of y when x = -3?

Answer 1

first you have to create an equation which is satisfy
when x=5
y=200

Answer 2

you have
\[y varies dir. as x ^{2}\]
you can rewrite that as
\[y=kx ^{2}\]
where k is a constant