Question

Which of the following equations is an example of inverse variation between the variables x and y?A.B.y = x + 9C.D.y = 9x

Answer 1

For an inverse variation, we have that y is inversely proportional to x, written as

`\begin{gathered} y\propto(1)/(x) \\ \propto\text{ is a proportionality sign} \end{gathered}`

removing the proportionality sign and introducing a constant k, we have that

`y=(k)/(x)`

so, if k is 9,

The answer becomes

`y=(9)/(x)`

Option A is the answer