Why did frederick douglass narrative and harriet beecher stowe’s uncle tom’s cabin build social support for abolition and scare slave owners culturally. ?

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