An interactive R Markdown report for ALY6015 (Intermediate Analytics) at Northeastern University. This analysis applies Ridge regression, LASSO regression, and backward stepwise selection to the ISLR College dataset to predict graduation rates across 777 American colleges. The report features interactive plotly charts (hover for details, click to filter, drag to zoom), searchable coefficient tables, color-coded variable selection results, and a complete reproducible R code appendix organized by section. Key findings: LASSO achieves the lowest test RMSE (≈9.62) while automatically reducing the model from 17 to 8 predictors, outperforming both Ridge (9.77) and stepwise selection (9.76). All code is fully reproducible with fixed random seeds.