This bubble chart shows the correlation between horsepower, torque, and highway MPG across 18 motorcycle brands. Each circle represents a brand, positioned by horsepower (x-axis) and torque (y-axis), with bubble size encoding highway MPG and color distinguishing manufacturers. Built with D3 v7 and SVG, it uses d3.scaleLinear for axes and bubble size, d3.scaleOrdinal with interpolateTurbo for colors, and interactive tooltips on mouseover. A legend explains bubble size values and includes a color key for all makes. Data comes from bikes.csv.