This interactive scatter plot displays car data from the UCI Machine Learning Repository Auto MPG dataset. Dropdown menus let users choose which numeric columns map to the X and Y axes, with the plot updating through animated transitions. Built with D3 v5, the visualization uses `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` for scales and axes, while a custom `dropdownMenu` module handles the selection controls. SVG circles render with opacity, and the code leverages `transition().duration()` and `.delay()` to animate points as the selected variables change.