![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Observe the graph:
\Consider the scale on the graph ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8da2268e35b6b6daab9c47f71c4c8bf4.png\")
-axis and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b1f02a70f7489dd3b8742e9e1c94d6d0.png\")
-axis is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d19ea8dec317fbe5a411fa4b88fab0db.png\")
unit.
Hence, the graph extendes to the left and to the right.
\The domain is the all real numbers. \ \
\The range is all real integers.
\![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
Domain is all real numbers.
\Range is all real integers.