The function is .
THe graph of the is similar to graph, but it shifts vertically up by one unit.
Observe the graph (b) is matches with graph.
Graph (b).
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fc865eeef46b888fd09edab3f802ca96.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fc865eeef46b888fd09edab3f802ca96.png\")
is similar to ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c9bd15d38c350c1c277c21750a763f54.png\")
graph, but it shifts vertically up by one unit. graph. ![\"\"](\"/userfiles/image/steps_images/solution.JPG\")