This bubble chart displays the correlation between average horsepower, torque, and highway MPG across multiple car makes, using circle size to represent fuel efficiency and color to distinguish manufacturers. Built with D3 v7, it loads data from a CSV file and renders an SVG with linear scales for the axes and bubble radius, plus an ordinal color scale. Interactive tooltips appear on mouseover, while legends for bubble size and color categories are drawn manually using SVG circles, lines, and text elements.