The table shows the number of times the dishwasher was used in three different houses over three days. Dishwasher Use House A House B House C Friday 1 2 2 Saturday 2 3 4 Sunday 2 2 3 On Friday, 17 point 5 total gallons of water were used. On Saturday, 31 point 5 total gallons were used. On Sunday, 24 point 7 5 total gallons were used. What is the difference between the water use per load of the dishwasher that uses the most water and the dishwasher that uses the least water?