This interactive scatter plot visualizes relationships between attributes of automobiles from a 1970s–80s dataset, with dropdown menus letting users choose which numeric columns map to the x and y axes. Circles transition from the center outward via `transition().duration()` as data updates. The visualization uses D3 v5’s `scaleLinear`, `axisBottom`, and `axisLeft` for axes, while SVG circles render points with opacity and hover highlighting.