![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The average rate of change of the temperature from 12:00 P.M. to 4:00 P.M. is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8e8cfb6f1af5bbb9ee370dca4c245dfb.png\")
.
The change in time value from 12:00 P.M. to 4:00 P.M. is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=58eb3dc1227e748a77be95d12384b4c5.png\")
The change in temperature value from 55 to 60 is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b74ce7b3811a1284abc9072a9c709daf.png\")
.
Substitute these values in the formula .
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cd221ac95656783344fea1543f16b56c.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f2275d280b204a0244d72b9cc8e8522c.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The average rate of change of the temperature from 12:00 P.M. to 4:00 P.M. is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6482392d305089c8e00ed4af7c1b53a2.png\")
.