Costa Atlantica Boat Tours charges $12.50 per ticket. Each cruise costs Number of passengers, X, Profit, P the Costa Atlantica Line $750 to operate, regardless of the number of on the cruise passengers. 0 -$750 100 $500 . If no passengers book a ticket, they will have a loss of $750, 150 $1,125 i.e., a profit of -$750. (A negative value of profit is a loss.) . If they book 100 passengers, their profit is $500. . If they book 150 passengers, their profit is $1, 125. See the table to the right. (a) Write the profit, P as a linear function of the number of passengers, x , on the cruise. P = (b) What number of tickets must be sold for them to break even, i.e., profit P = 0? They must sell Number tickets to break even