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
[tex] y=\frac{k}{x} [/tex]
or
[tex] x=\frac{k}{y} [/tex]
The expression which represents this condition is
[tex] x=-\frac{15z}{y} [/tex]
Hence option b) or the second option is the right answer.
