Rate of change:
\![\"\"](\"http://c4anything.com/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e6aaa0c2821cac55d2a1cdbfc5fc9312.png\")
\
![\"\"](\"http://c4anything.com/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=773d8ba322993d301bae929ad49748f0.png\")
\
\
\
![\"\"](\"http://c4anything.com/userfiles/image/Library/slope_line.gif\")
| \
Rate of change: \
\
\ \ \ | \
| \
![\"\"](\"http://c4anything.com/userfiles/image/steps_images/step1.JPG\")
Substitute ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7ef6d542432f7af68c57423e49c0378c.png\")
in rate of change formula.
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=69048ab01585bdcf19c2ceafd2fa423d.png\")
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=79c1f4d1b5c18e38907a02e9f6983e63.png\")
(Product of two same signs is positive)
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8abf1d84024889f6da72cd51ea588895.png\")
(Subtract: ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ed4b4a10f028c7d660905a33b1373ae6.png\")
) \ \
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2eedf3bf20ff20b5a90ffaf84db8ce23.png\")
(Divide: ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c1247d1e373cbf3917078bba04e946a6.png\")
)![\"\"](\"http://c4anything.com/userfiles/image/steps_images/solution.JPG\")
The rate of change represented in the graph is 1.2.