This interactive D3.js bubble chart visualizes the relationship between average horsepower, torque, and highway MPG for various car makes. Each bubble’s x-position represents horsepower, y-position represents torque, and its size encodes highway MPG, with color distinguishing individual brands. Built with d3.v7, the visualization uses d3.csv to load data, d3.scaleLinear for axes and sizing, and d3.scaleOrdinal for color. On hover, a tooltip displays exact values, while circle stroke and opacity adjust via d3.select and d3.color.