Question

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

Answer 1

Direct variation.

Explanation:

`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`