This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position encodes horsepower on the x-axis and torque on the y-axis, while its radius represents highway MPG and its color distinguishes the car brand. Hovering over a bubble reveals the make via a tooltip built with D3’s event handlers. The visualization uses d3.scaleLinear axes, d3.scaleOrdinal for color, d3.interpolateTurbo for the palette, and SVG circles animated through d3 transitions. Data comes from bubblechart.csv.