![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Observe the graph.
\The function ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7638897a5bb9204998d7996637c7b50a.png\")
is a parabola.
The rate of change of the function is decreasing.
\So, the derivative of the function is a linear function.
\The linear function is derivative of the function ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6701d7a3f2e8083f8425b59e0e8d2c86.png\")
Graph :
\Label the corresponding functions as ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7638897a5bb9204998d7996637c7b50a.png\")
and ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6701d7a3f2e8083f8425b59e0e8d2c86.png\")
.
![\"\"](\"/userfiles/116-76.gif\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The function is a linear function.
The derivative of the function is the horizontal line.
Graph is
\.