This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for 31 car makes. Each bubble's x-position maps to horsepower, the y-position to torque, and the bubble's radius encodes highway MPG. The color of each bubble is assigned per make using `d3.interpolateTurbo` and `d3.scaleOrdinal`. Hovering reveals a tooltip with the make name. The chart is rendered with D3.js v7 in SVG, including axes, a size legend for MPG, and a color legend. Data is loaded from a CSV file.