**Modeling** Predicting the volume of a tree based on diameter breast height by using training and test data to generate a linear regression model. When the residues lay in the horizontal line y=0, it points out that the predicted values perfectly match the actual values. Referring to the exploratory data [[https://posit.cloud/content/5925843|Exp]] to understand the Modeling[[https://posit.cloud/content/5925843|LRM]] {{ :opensci:2023:rdatanal:model:lrm.png?400 |}}