## College Algebra 7th Edition

$y$ is a function of $x$
Solve for $y$ in terms of $x$ to obtain: $\begin{array}{ccc} &2|x|+y &= &0 \\&2|x| + y - 2|x| &= &0-2|x| \\&y &= &-2|x| \end{array}$ The last equation above will give one value of $y$ for each value of $x$. Thus, the equation represents $y$ as a function of $x$.