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

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Answer 1 · 2017-08-29T02:47:39

$y/x=9$ => multiply both sides by $x$ :

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

where: $k$ is the constant of variation.

Thus in this case:

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

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