This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position encodes horsepower and torque, while its radius and color encode highway MPG and make, respectively. The chart uses d3.csv to load data, d3.scaleLinear for axes and bubble size, d3.scaleOrdinal with d3.interpolateTurbo for color, and SVG circles with mouseover tooltips. A legend for MPG values and make colors is included, and hover effects use opacity transitions.