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Do heavier cars really use more gasoline? suppose a car is chosen at random. Let x...

Do heavier cars really use more gasoline? suppose a car is chosen at random. Let x be the weight of the car (in hundreds of pounds) and let y be the miles per gallon (mpg). The following information is based on data taken from consumer reports (Vol. 62, No.4). If you use the least-square line to find the estimated response value y^ at x=38 (hundred pounds), then the y^ value in this question is ____

X 27 44 32 47 23 40 34 52
Y 30 19 24 13 29 17 21 14
Math   Statistics-And-Probability   
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