This interactive scatter plot visualizes automobile performance data from the UCI Auto MPG dataset. Each circle represents a vehicle, positioned by miles per gallon and horsepower, colored by country of origin, and scaled by weight. The visualization is built using the Vega-Lite API, which constructs the chart specification, with Vega rendering the SVG output. D3 handles CSV data loading, while Vega-Tooltip provides interactive hover details. The interface automatically fits the chart to the browser window, with customized axis styling and enlarged typography for improved readability.