This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes, with each circle’s position representing torque and horsepower, its size encoding highway MPG, and its color distinguishing manufacturers. Built with D3.js v7, it uses `d3.csv` to load data, `scaleLinear` and `scaleOrdinal` for mappings, and SVG circles with mouseover tooltips. The legend displays both MPG bubble sizes and color-coded make labels, with all values aggregated as averages from the source dataset.