Question

..............................

Answer 1

`\boxed{\mathrm{Option \: D}}`

Explanation:

Inverse variation is written as:

`y=(k)/(x)`

Where k is the constant of proportionality.

Answer 2

D y = 9/x

Explanation:

An inverse variation is of the form

xy = k where k is a constant

We can write this as

y = k/x

The only equation that is of this form is

D y = 9/x