This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for fictional car makes. Each circle's x-position maps to horsepower, y-position to torque, and radius to MPG, with color distinguishing individual makes. Built with D3 v7, the visualization uses `d3.scaleLinear` for axes, `d3.scaleOrdinal` for coloring, and `d3.interpolateTurbo` for the color palette. Hovering reveals a tooltip, and a legend displays the MPG scale. Data comes from the included `bubblechart.csv` file, rendered as SVG.