This example shows a scatter plot of auto-mpg data, mapping miles per gallon against horsepower, with color encoding for country of origin and point size for vehicle weight. Tooltips reveal car names on hover. The visualization is built using the vega-lite-api library, which wraps Vega-Lite specifications programmatically, with data loaded via d3.csv from the UCI Machine Learning Repository. It renders as an SVG through Vega, with a custom configuration for axis styling and tooltip interactions.