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Use the data in the Excel file MBA Motivation and Salary Expectations to determine how well a linear function models the relationship between pre- and post MBA salaries. Compare it to a third-order polynomial. What is your observation? O a. Both the linear and polynomial models have similar r-square values. O b. The linear has a higher r-square value than the polynomial model. O c. The linear has a lower r-square value than the polynomial model. O d. The linear and polynomial models have dissimilar r-square values