![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d1e2e168908cf5bb2fe462815f246443.png\")
, it touches the graph at two points. \
Vertical Line Test :
\A collection of points is the graph of a function provided that every vertical line
\intersects the graph in at most one point.
\\
Consider the vertical line at , it touches the graph at two points.
The graph does not satisfy the vertical line test.
\Thus, the graph is not a function.
\\
The graph is not a function.