A bubble chart visualizes the correlation between average torque, horsepower, and highway MPG for 31 car makes, with each bubble colored by make and sized by MPG. Hovering reveals a tooltip displaying the make. The chart uses d3.csv to load data, d3.scaleLinear for axes and bubble size, d3.scaleOrdinal with d3.interpolateTurbo for colors, and d3.axisBottom/Left to render axes. SVG circles, a size legend, and a color legend are drawn, with mouseover, mousemove, and mouseleave events controlling the tooltip.