This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across various car makes. Each circle’s position maps horsepower on the x-axis and torque on the y-axis, while its radius and color encode highway MPG and car brand. Built with d3.v7, it uses d3.scaleOrdinal for color, d3.scaleLinear for sizing, and SVG elements with mouseover tooltips displaying the make. A legend explains bubble sizes and brand colors, with data loaded from a CSV file.