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An equation that can be used to predict fuel economy (in miles per gallon) for automobiles is
= 41.3 - 0.004x1 - 0.0049x2
where x1 is the engine displacement (in cubic inches) and x2 is the vehicle weight (in pounds).
(a) x1 = 305, x2 = 3750
(b) x1 = 225, x2 = 3100
(c) x1 = 105, x2 = 2200
(d) x1 = 185, x2 = 3000
Use the multiple regression equation to predict the y-values for the values of the independent variables. |
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