This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across car makes. Each circle’s position encodes horsepower and torque, while its radius and color represent highway MPG and manufacturer, respectively, using a color ordinal scale and linear size scale. The D3 v7 code appends SVG elements, includes axes, a tooltip, and a legend for MPG values. A hover interaction displays the car make within a styled div.