In an area of the midwest, records were kept on the relationship

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     In an area   of the Midwest, records were kept on the relationship between the rainfall   (in inches) and the yield of wheat (bushels per acre). Find the equation of   the regression line for the given data.   Which is the best predicted   value for y given x = 18.4? Assume that the variables x and y have a   significant correlation   Rain fall (in inches), x |   10.5 | 8.8 | 13.4 | 12.5 | 18.8 | 10.3 | 7.0 | 15.6 | 16.0 |   Yield (bushels per acre), y |   50.5 | 46.2 | 58.8 | 59.0 | 82.4 | 49.2 | 31.9 | 76.0 | 78.8 |