This interactive scatterplot lets users explore the classic “Auto MPG” dataset by choosing which numeric columns appear on the x- and y-axes via two dropdown menus. Built with React, d3.v5, and SVG, it renders animated circles that transition to new positions when the selected columns change. The code uses `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` to map data, while a custom `dropdownMenu` component handles the select inputs and triggers re-renders through callbacks.