Re-Analyze the Song Propsal What conclusion can you make out of the comparison of both cost functions?

Re-Analyze the Song Propsal

1. What conclusion can you make out of the comparison of both cost functions?
2. Maybe it is the cost separation method!. Please redo 1 (above) and 2 (above) by using simple linear regression? An attachment with the tables is available for you to use. No need to discuss this question.
3. Did the result and conclusions of your analysis change after answering 2?
4. Can Delta be successful on the new segment? Is the strategy aligned with the microeconomic structure of Delta?
5. Some years after Delta's case situation, salaries were no longer the highest cost for Delta. Fuel prices increased dramatically after 2001. How can you deal with this new profitability threat from a cost management perspective? If costs cannot come down, how can we improve the profitability of a firm such as Delta?