This interactive scatter plot from the Auto MPG dataset (UCI Machine Learning Repository) lets users select which columns to map to the X and Y axes via dropdown menus. Using D3 v5, the visualization updates the axes and animates data points smoothly into their new positions as selections change. The code leverages `scaleLinear`, `axisBottom`, `axisLeft`, and transition methods to render SVG circles. The animation uses `transition().duration(200)` and per-point delays, with the dropdowns built through a reusable `dropdownMenu` component.