This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for various car makes. Each circle’s x-position represents horsepower, its y-position represents torque, and its size reflects highway MPG, while color encodes the car make. Hovering reveals a tooltip with the make name. Built with D3.js v7, it uses `d3.csv` to load data, `d3.scaleLinear` for axes and sizing, `d3.scaleOrdinal` for color mapping, and SVG for rendering, including a size legend.