This example visualizes the Auto MPG dataset from the UCI Machine Learning Repository, plotting each car as a circle positioned by weight and horsepower, colored by origin, and sized by miles per gallon. Hovering reveals the car name via a tooltip. The visualization is built with the Vega-Lite API (vl), which generates a Vega-Lite specification that is registered with vega and vegaLite and rendered as SVG. Data is loaded asynchronously using d3.csv from a Gist, and the chart uses custom axis and label styling from a shared config file.