8. In an area of the Great Plains, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushels per acre). Find the least-squares regression line for the given data. Round the least-squares regression line values to the nearest thousandth. Rainfall (in inches), X Affiw 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 a. Find the equation of the regression line for the given data. y = 4.2668111 + 4.3790 Round values to the nearest hundreth. Ups ent bait .s y = 4, 38x+ 4. 27 VI b) Based on the Rainfall, what would be the best predicted Yield based on a Rainfall of 14 inches? y = 4. 38 ( 14 ) 1edmun glory fee y Si ent of grose belolberg add bauon Round the regression line values and mean to the nearest tenth. 61 . 32 Jon vilw 10 vow nisiaxa Snollaeup oldsnoassi s d hisq al c) The decision to use y hat or the mean of y was based upon what computed value