The graph shows the number of gallons of water in a bathtub, y, as a function of time, x. 60 y Number of Gallons 50 40 30 20 10 0 1 2 3 4 5 Time (in minutes) For 0x5, which function best represents the graph? y= |16x-40| y= 16x 2.5 y= |16x+40| y=16x +2.5