ONLY ANSWER 13.2  13.1 Fitting a straight line to a set of data yields the following prediction line: Yni =2+5Xi a.  Interpret the meaning of the Y intercept, b0. b. Interpret the meaning of the slope, b1. c.  Predict the value of Y for X=3. 13.2 If the values of X in Problem 13.1 range from 2 to 25, should you use this model to predict the mean value of Y when X equals a.  3?  b.  -3?  c. 0?

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