This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for 31 car makes, with horsepower on the x-axis, torque on the y-axis, and MPG encoded by both bubble radius and color. The visualization uses d3.csv to load data, d3.scaleLinear for positioning and sizing, and d3.scaleOrdinal with d3.interpolateTurbo for color encoding. Interactive tooltips respond to mouse events, while SVG circles, axes, and a legend are rendered with d3.js v7, including animated opacity changes on hover.