This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across car makes, with bubble size encoding fuel efficiency and color distinguishing each manufacturer. Rendered as SVG with D3 v7, it uses `d3.scaleLinear` for axes and bubble sizing, `d3.scaleOrdinal` for color assignment, and `d3.interpolateTurbo` for a continuous color palette. Interactive tooltips appear on mouseover events, while legends explain the size mapping and categorical colors, with data sourced from a CSV file.