Final answer:
The expression f(80) = 35 in the function represents that a ticket price of $80 will result in a weekly profit of $35,000 for the airline on flights from Boston to Washington D.C.
Step-by-step explanation:
The given function f(p) represents the weekly profit an airline makes in thousand dollars when the ticket price is p dollars. Interpreting the expression f(80) = 35 means that when the ticket price is $80, the weekly profit to the airline on flights from Boston to Washington D.C. is $35,000. This function allows the airline to predict its profits based on varying ticket prices, which can be crucial for their pricing strategy and financial planning.