This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position encodes horsepower and torque on the x- and y-axes, while its radius and color represent highway MPG and car make, respectively. The chart 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 displays MPG values and make colors. The visualization is rendered as SVG with D3 v7.