The information below relates to storage costs over a six month period: Products stored Storage Month COS January February March April May June 5,500 3,700 3,500 2,300 4,500 2,800 5,370 3,826 3,620 2,570 4,450 2,925 Using the high-low method, the estimated cost function would be: y=632.5 + 1.142x y = 557.5 -0.875x y = 557.5 +0.875x y = 632.5 - 1.142x