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A scatter diagram includes the data points (x = 3, y = 8), (x = 5, y = 18), (x = 7, y = 30), and (x = 9, y = 32). Two regression lines are proposed: (1) , and (2) y^{^}= -2 4x.

Using the leastsquares criterion, which of these regression lines is the better fit to the data? Why?

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