Question

Which equation represents inverse variation between x and y?

Answer 1

Inverse variation means

When the value of x increases the value of y decreases.

When the value of x decreases the value of y increases.

So for an inverse variation we have the expression

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

or

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

The expression which represents this condition is

$x=-\frac{15z}{y}$

Hence option b) or the second option is the right answer.