in a class of 30 student, 12 take the train, 6 walk to school and the rest are driven by parents what is the percentage of this?

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