A student uses a sling psychometer to measure relative humidity. The dry bulb thermometer reads 59°F, and the wet bulb reads 41°F. the relative humidity is __ %​

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