![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The coordinates set is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8461197574fb2be5394087fb1e8249d7.png\")
.
The element 1 in the domain is paired with two elements 0 and 4 range.
\So, If x is 1, there are two possible values for y.
\The relation in this coordinates set does not represent a function.
\NOTE:
\Function: A function is a relation in which each element of the domain is paired with exactly one element of the range.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
No, the relation is not a function.