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I've never been a huge baseball fan, but I do like data. This interactive display shows the total expenditure of every Major League Baseball team (from 1998 out until a few years in the future). Clicking on a team in the top chart will break that expenditure down per player and show what each player makes per year. Just looking at this chart for a few minutes, I've come up with the following questions that could be used in a math class for a problem solving lesson. Some of these questions would also require the students to locate some additional data as well. * Is there a correlation between team expenditure and winning the Championship/making the playoffs/number of wins in a season? * What percent of a team's total expenses do "star players" take up? * Are star player's "worth it" for a baseball team? * How have team expenses changed over the past 15 years? * Are baseball players being paid more today than in the past or are their salaries just keeping up with inflation? * How much do today's baseball stars make in comparison to the stars of the late 90's and early 00's? Is this difference warranted? I'm sure there are plenty of better questions here that I'm missing.