Question 261439
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). 
Rain fall, x 10.5 8.8 13.4 12.5 18.8 10.3 7.0 15.6 16.0
Yield, y 50.5 46.2 58.8 59.0 82.4 49.2 31.9 76.0 78.8
Find the equation of the regression line for the given data. Round the line values to the nearest two decimal places. 
Answer: 9(7187.77)-(112.9)(532.8)/square root 9 (1521.39)-112.92 square root 9 (33,836.58)-532.8*532.8=453.6/square root 9.46 square root 2.06 =0.962 
Using the equation found in part a, predict the bushel yield when the rainfall is 11 inches 
Answer: 11(7187.77)-(112.9)(532.8)/square root (1521.39-112.92*112.92 square root 11 (33,836.58-532.8*532.8=189.1/square root 1.28 square root 1.82=1.440 
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Linear Regression Equation:
y = 4.3791x+4.267
r = 0.9808...
Positive linear correlation
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Cheers,
Stan H.