This interactive scatter plot visualizes the Auto MPG dataset from the UCI Machine Learning Repository, mapping fuel efficiency against horsepower, with color by origin and point size by weight. It uses the Vega-Lite API to declaratively define the visualization, with D3.js loading the CSV data. The example demonstrates integrating Vega-Lite's high-level grammar with a custom configuration for improved readability, including styled axes and labels, and fits the chart responsively to the full viewport while enabling tooltips through Vega Tooltip.