Question: A scatter diagram includes the data points (x 5 3, y 5 8), (x 5 5, y 5 18), (x 5 7, y 5 30),

A scatter diagram includes the data points (x 5 3, y 5 8), (x 5 5, y 5 18), (x 5 7, y 5 30), and

(x 5 9, y 5 32). Two regression lines are proposed:

(1) y ˆ 5 5 1 3x, and (2) y ˆ 5 22 1 4x. Using the leastsquares criterion, which of these regression lines is the better fit to the data? Why?

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