A bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each bubble’s position maps to horsepower (x-axis) and torque (y-axis), while its radius and color encode highway MPG and make, respectively. The visualization uses D3.js v7 to render SVG circles, with a tooltip on hover and a legend for MPG scaling and make colors. Data comes from bubblechart.csv, processed through d3.csv and d3.scaleOrdinal. The chart includes silver axes via d3-axisLinear and uses d3.interpolateTurbo for color mapping.