Estimate the salary cost function for Delta. Despite the fact you can choose between some feasible drivers, please use Revenue Passenger Miles for this part of the case. Use the High Low method. Estimate the salary cost function for JetBlue. Use the high low method. Now, let's discuss the results. What conclusion can you make out of the comparison of both cost functions? Maybe it is the cost separation method!. Please redo 1 (above) and 2 (above) by using simple linear regression?