The function is .
.
The interval is .
(1). Draw the coordinate point.
(2). Graph the function .
Graph:
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a43865170fa4418df50888e74b6603ad.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=eb114ceed6070afc02f80041579de502.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=36fec1a1aff1f1844c0f36968987ec3a.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c2b1c0b0dd3670b9f703878a9e9f1968.png\")
.![\"\"](\"/userfiles/494-108.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")