This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each bubble’s x-position maps to horsepower, y-position to torque, and its radius encodes highway MPG, while color distinguishes the brand. The chart includes a legend for bubble size and a tooltip that appears on mouseover, implemented with d3.v7 and SVG. Data is loaded from a CSV file, and scales such as d3.scaleLinear and d3.scaleOrdinal handle the visual mapping.