Question: (a) It is believed that the relationship between a variable X and a response Y is linear of the form y = a +

(a) It is believed that the relationship between a variable X and

(a) It is believed that the relationship between a variable X and a response Y is linear of the form y = a + x+ Four observations are made. The observations are 1.0 2.0 2.5 3.0 y 3.1 4.8 6.2 6.9 Two straight lines are fit to this set of points. y=2+x y = 2.5x How would you measure how well a straight line fits the set of points? Use your measure to decide which is the better fitting straight line.

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