This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position encodes horsepower on the x-axis and torque on the y-axis, while its radius and color represent highway MPG and car make, respectively. Built with D3 v7, the SVG visualization uses `d3.scaleLinear` for axes and bubble size, `d3.scaleOrdinal` with `d3.interpolateTurbo` for categorical coloring, and includes interactive tooltips with mouseover events. A legend decodes circle size and color mappings.