This bubble chart examines the correlation between a vehicle's average horsepower, torque, and fuel efficiency. The visualization uses a simple scatter plot where the x-axis represents horsepower, the y-axis represents torque, and the size of each bubble encodes the vehicle's highway MPG. A legend for bubble size and categorical color coding by car make are included. The chart is rendered using `d3.svg` with an animated tooltip that displays the car make on hover, with the data sourced from `bubblechart.csv`.