Patty and Tim are asked to find the slope of the line passing through the points and .
Since, tim calculated slope as the ratio of the change in to the change in .
Therefore, Patty is correct.
Patty is correct.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4f1422011b93ed329911758d366423fa.png\")
and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=41bfc9b03965e09137931a7396ca82ca.png\")
. ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9b30830d09a01ddabb572ba1fa8422fa.png\")
to the change in ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a3f91542799f66d90aa20847efdadad7.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")