Ted researched the price of airline tickets and discovered a correlation between the price of a ticket and the number of miles traveled. after recording his data on a scatter plot, he determined the equation for the line of best fit is y = 300 + 0.45x. what does 0.45 represent in the equation? a) the lowest ticket price b) the number of miles traveled c) the expected change in the price of multiple tickets eliminate d) the expected change in price of the ticket for each mile traveled