This example presents a scatter plot of automotive data, showing the relationship between vehicle weight and horsepower. Each circle’s position encodes these quantitative fields, while color represents the country of origin and size encodes miles per gallon (mpg). Hovering reveals the car’s name via a tooltip. The visualization is built with the vega-lite-api, which wraps Vega-Lite and Vega, and uses d3.csv to load the auto-mpg dataset. The code configures axes, scales, and styling through the vega-lite-api’s fluent method chaining.