This scatter plot visualizes relationships among automobile characteristics from the auto-mpg dataset, plotting displacement against horsepower while encoding vehicle weight through point size and model year through color. Tooltips reveal car names on hover. The visualization is built with the vega-lite-api library, which registers Vega and Vega-Lite, and loads data asynchronously via d3.csv. The chart renders responsively using an SVG renderer with the vega-tooltip Handler for interactive annotations.