Analysts at the Milk Company calculated the average price of a gallon of its milk over 10 years. The following table shows the years since 2010 and the average price of a gallon of milk at that time.
Years (since 2010) 0 1 2 3 4 5 6 7 8 9
Price (in dollars) 3.16 3.43 3.37 3.36 3.42 3.21 3.24 3.01 2.85 3.05
Which of the following representations is most appropriate for showing how the price changed each year?