Judith can ride her bike 2 mph faster than kelly. do you know it takes 48 minutes less to travel 50 miles and kelly does. what is each person speed in miles per hour

Which statement is true about the local minimum of the graphed function? over the interval[-4,-2], the local minimum is 0. over the interval [-2,-1] , the local minimum is 25. over the interval [-1,4], the local minimum is 0. over the interval [4,7], the local minimum is -7