![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0dc7d8c75bb35004f7b31c06a0449a70.png\")
and increasing on ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=267d961505c3cd0fe68bad8d728e1605.png\")
.Observe the graph, the domain of the function is all real numbers and the range of the function is non-negative real numbers.
\The function is decreasing on and increasing on .
The function has an absolute minimum.
\Therefore, it is a absolute value function.
\![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
Option ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9149c0696b3916a19645d3dc662e3ef0.png\")
is correct.