This interactive scatter plot visualizes the relationship between vehicle weight, horsepower, and fuel efficiency (mpg) in the Auto MPG dataset from the UCI Machine Learning Repository. The visualization uses the Vega-Lite API to declaratively define a markCircle with quantitative scales, color-encoding by country of origin, and tooltips displaying vehicle names. Rendered as an SVG, the chart supports interactive tooltips through vega-tooltip and d3.csv for asynchronous data loading, with a custom config for axis styling and fonts.