This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for various car makes. Each circle's x-position represents horsepower, the y-position represents torque, and the circle's radius encodes highway MPG, with color distinguishing makes. The chart uses D3.js v7 with an SVG rendering and includes interactive tooltips on mouseover. The implementation demonstrates D3's selection, scales, and data join APIs, along with axis generation and custom legends for size and categorical color encoding.