Direct Variation: Divide `y` by `x` to find constant of variation, `k`.

Question

`\frac{y}{x}=k`

Indirect Variation: Multiply `x` and `y` to find constant of variation, `k`.

`xy=k`

Answer 1

Inverse Variation: Divide constant of variation, `k`, by the product of `x` and `y`.

`\frac{k}{xy}=1`