# How do you determine whether y/x=9 is an inverse or direct variation?

Aug 29, 2017

#### Explanation:

$\frac{y}{x} = 9$ => multiply both sides by $x$:

$y = 9 x$ => in the form of $y = k x$ => $y$ varies directly as $x$,

where: $k$ is the constant of variation.

Thus in this case:

$y = 9 x$ => $y$ varies directly as $x$, $k = 9$