Observe the figure, So this is the table relation.
Then X, Y coordinates relation is .
Inverse relation: Exchange x and y in each ordered pair to write the inverse relation.
The relation is .
The Inverse relation is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fbe06f229483ba7f6bb02414c8f78589.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=552a886dfcc80dace23e7135d36ca949.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fbe06f229483ba7f6bb02414c8f78589.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=552a886dfcc80dace23e7135d36ca949.png\")
.