This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for various car makes, with circle size representing fuel efficiency and color mapping to the car manufacturer. Built with D3.js v7, it uses `d3.scaleLinear` for axes and bubble radius, `d3.scaleOrdinal` for categorical colors via `d3.interpolateTurbo`, and `.on("mouseover")` event handlers for tooltip display. The SVG output includes axis labels, a size legend for MPG values, and animated transitions on hover.