![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Rate of change = ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c38401cd69275238f6259af497d8b1de.png\")
.
The amount of water changes from 0 gal to 35 gal and the time changes from 0 min to 7 minutes.
\Rate of change = ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=be8dd810ec76c837efd85782982cec65.png\")
Rate of change = ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dd2210965cda95999180f1f8f6774058.png\")
Rate of change = ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6ad720ab96d9aae4b4a1e424bc67112b.png\")
. (Divide: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7eea5db221a4e7823716bb850293c5df.png\")
)
So, the rate of change is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6ad720ab96d9aae4b4a1e424bc67112b.png\")
, or a decrease of 5 gal/min per one minute. ![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The rate of change is .