![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Observe the graph.
\The function ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7638897a5bb9204998d7996637c7b50a.png\")
is a cubic function.
The rate of change of a cubic function is quadratic function ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6701d7a3f2e8083f8425b59e0e8d2c86.png\")
.
The rate of change of a quadratic function is a lilnear function ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=265e1518e8d6dabd8562b050cc917ff3.png\")
.
Graph :
\Graph the function and its derivatives.
\![\"\"](\"/userfiles/128-114.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
Graph of the function and its derivatives is
\.