This interactive scatter plot visualizes automobile characteristics from the UCI Auto MPG dataset, comparing fuel efficiency (mpg) against horsepower while encoding weight through point size and origin through color. The visualization is built using the Vega-Lite API, which programmatically constructs the specification through chained methods like `markCircle`, `encode`, and field mappings. It imports and registers Vega, Vega-Lite, and Vega-Tooltip libraries, fetches CSV data via `d3.csv`, and renders to SVG with custom styling for axis labels and tooltips.