The cows at the Evaleen Dairy produce enough milk to fill a -gallon truck each day. The milk is then hauled to a processing plant where it is put into smaller storage tanks. Each storage tank holds gallons of milk. Make a graph that shows the number of storage tanks needed as the truck is emptied.
Label the -axis "Amount of milk left in the tanker". Label the -axis "Number of storage tanks filled". Your graph should be a step function.