This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across various car makes, with each circle colored by manufacturer and sized by fuel efficiency. It uses d3.csv to load data, d3.scaleLinear for axes and bubble sizing, and d3.scaleOrdinal with d3.interpolateTurbo for color encoding. Interactive tooltips appear on mouseover via d3 transitions, while a legend explains the MPG scale. The visualization is rendered as SVG with hover effects that increase opacity and stroke width.