This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s x-position corresponds to horsepower, its y-position to torque, and its radius to highway MPG, while color encodes the car make. The chart includes an MPG size legend and a color legend for makes. Built with D3 v7, the SVG renders a tooltip on mouseover, and colors are assigned using `d3.interpolateTurbo` via a categorical scale.