This bubble chart shows the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position encodes its make’s horsepower (x-axis) and torque (y-axis), while the radius scales with highway MPG and color categorizes the brand. Built with D3 v7’s `scaleLinear` and `scaleOrdinal` APIs, it renders as an SVG with an interactive tooltip that appears on mouseover. The data is loaded from a local CSV file, and a legend explains the MPG bubble sizes and color-coded makes.