This bubble chart shows the correlation between a vehicle's average horsepower (x-axis), average torque (y-axis), and highway MPG (bubble size and color). Each bubble represents a car make, with color mapping to the specific brand and size scaled to its highway fuel efficiency rating. The visualization uses D3.js v7 to render SVG elements, with a tooltip that appears on mouseover. The chart includes an interactive legend for bubble size and a color legend, with data loaded from a CSV file.