This interactive bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position maps horsepower and torque, while its size represents highway MPG, and its color distinguishes brands. Built with D3.js v7, the visualization uses `d3.scaleLinear` for axes and bubble size, `d3.scaleOrdinal` with `d3.interpolateTurbo` for colors, and SVG circles with hover tooltips. Data is loaded from a CSV, and an on-screen legend explains the size scale and color mapping.