This interactive scatter plot visualizes automobile data from the UCI Machine Learning Repository’s Auto MPG dataset. Users select which data columns map to the X and Y axes via dropdown menus, with circles animating to their new positions over two seconds when the selection changes. The code uses D3 v5’s `scaleLinear`, `axisBottom`, `axisLeft`, and `transition().duration()` to render the SVG visualization. A reusable `dropdownMenu` module handles the selector UI, while `scatterPlot` manages the axes, labels, and animated circle transitions.