This bubble chart shows the correlation between average horsepower, torque, and highway MPG across 31 car makes, with each circle’s position mapping to horsepower and torque while its size and color encode highway MPG and brand identity. The visualization uses D3.js v7 with SVG rendering, scaling bubble radius via d3.scaleLinear and assigning colors through a d3.scaleOrdinal. Hovering reveals a tooltip with the make name, and animated transitions adjust its opacity. A legend conveys MPG values through circle sizes and make-specific color swatches from the CSV dataset.