#### Answer

$y$ is not a function of $x$

#### Work Step by Step

RECALL:
If all vertical lines will pass through the graph in at most one point, then the graph represents $y$ as a function of $x$. Otherwise, the graph does not represent $y$ as a function of $x$.
Notice that a number of vertical lines (such as x=0) will pass through the graph at two points. The graph fails the vertical line test.
Thus, the given graph does not represent $y$ as a function of $x$.