The graph of the equation is .
The graph is represent a vertical line. \ \
So, the graph represent a function.
Yes, the graph represent a function.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=efe71488fbbef1472e2341be1f31454c.png\")
.![\"graph](\"/userfiles/image/Library/Algebra1/graph_of_line_y_equal_minus_15.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")