This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s x-position maps to horsepower, y-position to torque, and its radius encodes highway MPG, while color distinguishes the manufacturer. Rendered as SVG with D3 v7, the visualization uses `d3.scaleLinear` for axes and bubble size, `d3.scaleOrdinal` with an interpolated turbo color palette for categories, and a custom tooltip on mouseover. Animated hover effects and a dual legend for MPG values and color categories are included. The data comes from a CSV file.