This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each bubble’s position encodes horsepower and torque, while its radius and color map to highway MPG and make. The chart uses d3.scaleLinear for axes and sizing, d3.scaleOrdinal with d3.interpolateTurbo for colors, and SVG circles. Interactive tooltips appear on mouseover using d3 transitions, and a legend indicates MPG values. Data comes from a CSV file.