This interactive scatter plot lets users explore the relationships between different attributes of cars from the auto-mpg dataset. Dropdown menus dynamically select which numeric columns are plotted on the x and y axes. The visualization uses D3’s `scaleLinear`, `extent`, and `axisLeft`/`axisBottom` to construct axes with gridlines, and `transition().duration(1000).delay()` animates circles to new positions when axes change. Data is loaded via `csv()`.