# How do you determine whether 5x-y=0 is an inverse or direct variation?

$5 x - y = 0 \mathmr{and} 5 x = y \mathmr{and} x = \frac{y}{5} \mathmr{and} \frac{x}{y} = \frac{1}{5}$ (constant)
The constant of variation is $\frac{1}{5}$ i.e x varies directly $\frac{1}{5}$ of y. [Ans}