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The function is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=18210bc14fc50a0d16d732251c1418bf.png\")
.
The domain is a set of individual points, and these points have different x coordinates and the different y coordinates, so these are distinct points and its graph consists of points that are not connected.
\The points are distinct, so the relation is discrete.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The points are distinct, so the relation is discrete.