![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Definition :
\A function is a special type of 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/step2.JPG\")
The relation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=efadffd9edf7d50a6a3e7cf41d17eb86.png\")
.
Draw the figure for the given relation.
\![\"\"](\"/userfiles/47-57-26.gif\")
The relation is a function because the each element of the domain is paired with exactly one element of the range.
\The domain of the relation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a17b72ab6d3fb784a2ec684ed0d6e552.png\")
.
The range of the relation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=95b9baa6a3ddc1124d4c59bb768dd7ba.png\")
.
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The relation is a function.
\The domain of the relation is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a17b72ab6d3fb784a2ec684ed0d6e552.png\")
.
The range of the relation is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=95b9baa6a3ddc1124d4c59bb768dd7ba.png\")
.