A bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for various car makes. The chart uses d3.scaleLinear for both axes and bubble radius, with a d3.scaleOrdinal mapping car makes to colors from d3.interpolateTurbo. Interactive tooltips appear on mouseover, showing the car make. The legend indicates highway MPG values and color-coded car makes. Data is loaded from a CSV file and rendered as SVG circles with animation.