This interactive scatter plot visualizes the relationship between two selected variables from the auto-mpg dataset, with dropdown menus for choosing the x and y axes. The d3.v5 code uses `scaleLinear` for axes, `extent` for domains, and `axisBottom`/`axisLeft` for rendering. Circles animate via `transition().duration()` when selections change, while the `dropdownMenu` module updates labels. Data is loaded as CSV and numeric fields are parsed before plotting.