This scatter plot visualizes car data from the UCI Machine Learning Repository’s Auto MPG dataset. Using dropdown menus, users select which columns map to the X and Y axes, with the chart updating dynamically. The D3 v5 code uses `scaleLinear`, `extent`, `axisLeft`, `axisBottom`, and a custom `dropdownMenu` component. SVG circles animate via `transition().duration(2000).delay()`, while axis labels and gridlines render from selected attributes like horsepower or weight.