Apparently you had to scooty out of here before you had a chance to tell us what the choices are. So there's no way for anybody to help you find the correct ones.
For an equation to show direct variation:
-- When either 'x' or 'y' is zero, the other one must be zero too.
-- 'x' and 'y' must both be to the first power in the equation. What I mean is; no squares or higher powers of 'x' or 'y', no square roots, or cubes etc.
and
-- If 'x' or 'y' is in the denominator of a fraction, then it has to be in the numerator too.
