Question

tell whether x and y show direct variation.
xy=5

Answer 1

yes... they show direct variation

Answer 2

Form of direct variation looks like y = kx, where k is any constant number (2, 3/4, 1/3, etc)

So here you have xy = 5.

Divide both sides by x, and you have y = 5/x.

So it is not direct variable, it is inverse variation.