Kathy is attending school in Philadelphia. Each year she returns home to visit her family and friends in New York City. Kathy’s annual demand curve for train tickets from Philadelphia to New York is provided in the accompanying graph. How much benefit does Kathy receive from each trip home? If the price of a round-trip ticket is $230, how many trips should Kathy take? 

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Price (per round-trip ticket) $500 $400 $300 $200 $100 0 1 2 3 5 Demand Quantity (number of round-trip tickets) Stevenson/Wolfers, Principles of Economics, 1e, 2020 Worth Publishers