Could you please explain the answers. Thanks! 3. Do heavier cars use more gasoli

Question

Could you please explain the answers. Thanks!
3. Do heavier cars use more gasoline? To answer this question, a researcher randomly selected 15 cars. He collected their weight (in hundreds of pounds) and the mileage (MPG) for each car. From a scatter plot made with the data, a linear model seemed appropriate. The following output was obtained from SPSS: Model Stummary Adjusted Std. Error of Model Multiple R R Square RSquare the Estimate 6.780 Coefficients Unstandardized Coefficients Model Constant) 40.439 WEIGHT Std. Error 6.275 164 6.445 3.182 521 0072 what is he equation oth l restion liten A) y -0.52 x + 0.164 B) y 40.44-0.52x C) y = 40.44 + 6.28x D) y = 40.44 + 0.52x

Explanation / Answer

3)Equation of the least square line is

y(hat) =a+bx

Here a is the constant/intercept coefficient and b is the slope constant.

Hence the leastsquare line is B) y(hat) =40.44-0.52x (Ans)

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