An airline company uses the graph of the function below to display the percent above or below the average price per ticket for a specific route, where x is the price the passenger paid and f(x) is the positive percent difference.

what is the correct interpretation of the point (250,0)?

a.) the average price per ticket is $250.
b.) the minimum price per ticket is $250.
c.) the maximum difference paid is 250%.
d.) the average difference is 250%.