4. Two shops rent snowboards for rental fee plus a fee per hour. The table shows the total costs (in dollars) for different numbers of hours at Shop A. The total cost y (in dollars) for hours a Shop B is represented by the equation y = 5x + 9 . Which shop charges less per hour? Shop A Number of hours, 1 Total cost , y $13 $19 $25 2 34 $31 5 $37 Shop A Shop B 43 How many hours must a snowboard be rented for the total costs to be the same ? hours