This interactive bubble chart visualizes the correlation between average engine power, torque, and highway fuel efficiency across various automobile makes. Each circle’s x-position maps to engine power, its y-position to torque, and its radius to fuel efficiency, with color distinguishing makers. Built with D3 v7, it uses `d3.scaleLinear`, `d3.scaleOrdinal`, and `d3.interpolateTurbo` for encodings, plus mouse event handlers for tooltips. The SVG render includes axis labels and a legend for bubble size, sourced from automakers.csv.