This bubble chart shows the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position encodes horsepower (x-axis) and torque (y-axis), while the radius maps to highway MPG and color distinguishes car make. Built with D3.js (v7), the visualization includes hover tooltips, a legend for MPG values, and a color legend for makes. Data is loaded from a CSV file, rendered as SVG, and scales are defined using `d3.scaleLinear` and `d3.scaleOrdinal`.