This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes, with each circle's position mapping horsepower and torque while its radius encodes fuel efficiency. The visualization includes a tooltip that displays the car make on hover, alongside dual legends showing both the bubble size scale and color-coded makes using `d3.scaleOrdinal` with interpolated Turbo colors. Built with D3 v7, the chart renders as SVG and uses `d3.scaleLinear` for axes and bubble sizing, with data loaded from a CSV file and interactive hover states managed through mouse events.