This interactive scatterplot visualizes the auto-mpg dataset, with dropdown menus allowing users to select which columns to plot on the x and y axes. The visualization renders data points as semi-transparent red circles that animate from the center outward to their positions over two seconds, staggered by index. Built with D3 v5, the example uses `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.extent` to construct scales and axes, while a custom dropdown menu component and SVG transitions handle interactivity and rendering.