The estimates resulting from the regression of sorghum production onto population and precipitation gives Equation 11. Both population and precipitation explain the variability of sorghum at about 73%. This is the same explanation from population (≈73%) alone and more than double the explanation provided by precipitation (≈32) in simple linear regression. The population estimate (1) is statistically significant with a p-value of 2.05x10-5, while the estimate for precipitation (2) is not significant with a p-value of 0.2899. The model predicting sorghum production onto population and precipitation is statistically significant with a p-value of 1.491x10-6, and its RMSE is 2.646328x10-12.