posted by brian .
at 3:30pm kendra was 475 miles from home. At 7:00pm she was 258 miles from home Find rate of change in kendra's distance from home .... show work
In 3.5 hours she changed distance by 217 miles.
rate of change is (258-475)/3.5 = -217/3.5 = -62mph
negative because she's getting closer to home; distance is decreasing.