Baseball salaries 2015 Ballplayers have been signing ever-larger contracts. The highest salaries (in millions of dollars per season) for each year since 1874 are in the data file Baseball salaries 2015.

a. Make a scatterplot of Adjusted salary vs. Year. Does it look straight?

b. Find the best re-expression of Adjusted salary that you can to straighten out the scatterplot.

c. Fit the regression for the re-expression you found in part b, and write a sentence telling what it says.

d. Plot the residuals of the model in part c against Year.

e. Comment on the model you found given the residual plot in part d.