This bubble chart shows the correlation between average horsepower, torque, and highway MPG for different car makes. Each circle’s position encodes horsepower and torque, its size maps to highway MPG, and its color distinguishes the manufacturer. The D3.js code reads a CSV, uses linear scales for axes and bubble radius, employs `d3.interpolateTurbo` for a color gradient, and includes an interactive tooltip that updates its position on mouse movement with a transition effect.