Question

Determine if the equation describes y as a function of x

xy=4

Answer 1

`\huge\begin{array}{ccc}y=(4)/(x)&\text{for}&x\\eq0\end{array}`

We have:

`xy=4`

We need:

`y=?`

Let's transform the equation:

`xy=4\\\\(xy)/(x)=(4)/(x)\qquad\text{for}\ x\\eq0\\\\\boxed{y=(4)/(x)}`