This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for different car makes. D3.js v7 renders SVG circles positioned by linear scales for horsepower and torque, with circle size encoding highway MPG and color mapped to car make via a custom ordinal scale using interpolateTurbo. Interactive tooltips display the make on mouseover, while legend circles and color swatches clarify the encoding. The chart loads data from a CSV file, with styling handled through CSS classes.