This example visualizes automobile fuel economy data from the UCI Auto MPG dataset, plotting cylinders against horsepower with circles colored by origin and sized by weight. It uses the Vega-Lite API to declaratively define the scatter plot, with tooltips showing car names. The visualization leverages d3.csv to load the data, Vega-Lite’s config for axis and label styling, and renders via Vega’s SVG output. The chart fills the browser window with an interactive tooltip handler from vega-tooltip.