This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for various car makes. Each bubble's position is determined by horsepower (x-axis) and torque (y-axis), while its size encodes the highway MPG value. The chart uses a linear scale for positioning and a separate scale for bubble radius. Interactivity is provided through tooltips that display the car make on hover, using mouseover events. The visualization is rendered as an SVG, with a legend showing the MPG scale and a color-coded list of car makes. The code utilizes d3.csv for data loading and d3.scaleLinear for axis and size scaling.