![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=05011e2e243c2b78096a13ec60622854.png\")
on the given graph.Vertical line test :
\Draw a vertical line at on the given graph.
Graph :
\ \Observe the graph :
\The vertical line ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=05011e2e243c2b78096a13ec60622854.png\")
intersects the graph of the function at more than one point.
Therefore, the graph does not represents ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b1f02a70f7489dd3b8742e9e1c94d6d0.png\")
as a function of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8da2268e35b6b6daab9c47f71c4c8bf4.png\")
.
The graph does not represents as a function of .