Suppose that in the year 2010, the cost of a compact car averaged $14200 and that in 2013, the cost averaged $15700. Assuming that the relationship between year xx and cost yy is linear, develop a formula for predicting the average cost of a compact car in the future. Let the variable xx be the years since 2010. Be sure to use the lower case variables xx and yy. . What do you predict the average cost of a compact car will be in the year 2015? Note: You can earn partial credit on this problem.