A bubble chart displays the correlation between average horsepower, torque, and highway MPG for various car makes. Each bubble's position encodes horsepower and torque, while its radius represents highway MPG, and its color distinguishes the manufacturer. The visualization uses D3 v7's `scaleLinear` and `scaleOrdinal` axes, and implements interactive tooltips that reveal the car make on hover. A legend demonstrates how bubble size maps to MPG values, and the chart is rendered as an SVG with animated transitions for tooltip visibility. Data is loaded from a local CSV file.