![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Pairs of points ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cfc47f963f8aab9f2407acb7c3c1a333.png\")
Plot the order of pairs.
\![\"\"](\"/userfiles/image/Library/Algebra%202/Graph_A2_g08_pa_70_pr_62_1.gif\")
The relation is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cfc47f963f8aab9f2407acb7c3c1a333.png\")
The domain of the relation is the set of all first (x-coordinates) coordinates.
\The domain of the relation is: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c0c460748ccc052281856649d8fbd285.png\")
The range of the relation is the set of second (y-coordinates) coordinates.
\The range of the relation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f72e4689eabc6feee82114d72d08f94a.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Draw the vertical lines through the points. Observe that one vertical line
\passing through two points. This graph fails the vertical line test.
\![\"\"](\"/userfiles/image/Library/Algebra%202/Graph_A2_g08_pa_70_pr_62_2.gif\")
So, the relation is not a function.
\![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
No, the relation is not a function.
\