The line plot displays the cost of used books in dollars. Cost of Used Books . 2 3 5 6 7 8 9 Cost in Dollars Which measure of center is most appropriate to represent the data in the graph, and why? O The mean is the best measure of center because the data is skewed. O The mean is the best measure of center because the data is symmetrical. The median is the best measure of center because the data is skewed. The median is the best measure of center because the data is symmetrical