![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
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The relation is,
\![\"\"](\"/userfiles/image/Library/functionspa77_p10.gif\")
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Express the relation as ordered pairs. ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a5115801e71b12d8734c5b41b00d3a41.png\")
Draw a table with two columns and list the x-coordinates in the first column and y-coordinates in the second column.
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x \ | \
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y \ | \
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-6 \ | \
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5 \ | \
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-4 \ | \
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2 \ | \
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-1 \ | \
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1 \ | \
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2 \ | \
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1 \ | \
![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
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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=8b13cb1106b7f921527dd53b941711aa.png\")
The range of the relation is the set of first (y-coordinates) coordinates.
\The range of the relation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=db95021498b21016dbd38b63247a6569.png\")
![\"\"](\"/userfiles/image/steps_images/step3.JPG\")
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Each element of the domain is paired with exactly one element of the range. Therefore the relation is a function and this one-to-one function.
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
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Yes the relation is a function.
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