This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 20 car makes. Each bubble’s position encodes horsepower on the x-axis and torque on the y-axis, while its radius and color represent highway MPG and make respectively. Built with d3.v7, it renders scalable vector graphics (SVG) circles with a black tooltip that appears on mouseover showing the make. The visualization employs d3.scaleLinear, d3.scaleOrdinal, and d3.interpolateTurbo for scales and color, with static legends for size and categorical colors.