![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The coordinates set is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6b80e9bfc495e75cd8153e3fc41c3367.png\")
.
The element 4 in the domain is paired with two elements 5 and 7 range.
\So, If x is 4, there are two possible values for y.
\The relation in this coordinates setdoes 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.