This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes, with each bubble’s position encoding the first two variables and its radius representing fuel efficiency. The visualization uses D3 v7 with SVG rendering and includes interactive tooltips that appear on mouseover to display the car make. A legend breaks down bubble size by highway MPG values and color-codes each make using the `d3.interpolateTurbo` scale, while axes are drawn with `d3.axisBottom` and `d3.axisLeft` from CSV data.