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SECTION 4.3 TRY 4.29 Salaries of College Graduates (Example 3) The scatterplot shows the median starting salaries and the median mid-career salaries for graduates at a selection of colleges. (Source: http://online.wsj.com/public/resources/documents/info -Salaries_for_Colleges_by_Type-sort.html. Accessed via StatCrunch. Owner: Webster West) a. As the data are graphed, which is the independent and which the dependent variable? b. Why do you suppose median salary at a school is used instead of the mean? c. Using the graph, estimate the median mid-career salary for a median starting salary of $60,000. d. Use the equation to predict the median mid-career salary for a median starting salary of $60,000. e. What other factors besides starting salary might influence mid-career salary? Mid-Career = -7699 + 1.989 Start Med 150 125 (thousands of dollars) Mid-Career Median Salary 100 75 tical 50 MI trend 30 40 50 60 70 80 10WS. Start Median Salary (thousands of dollars per year)