This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position maps horsepower and torque on the x- and y-axes, while its radius and color encode highway MPG and manufacturer, respectively. The visualization uses d3.csv to load data, d3.scaleLinear for axes and sizing, and d3.scaleOrdinal with d3.interpolateTurbo for color mapping. Interactive tooltips appear on mouseover, and a legend communicates both MPG scale and make-specific colors. The SVG rendering includes animated hover effects that enhance opacity and stroke width.