This bubble chart shows the correlation between average horsepower, torque, and highway fuel efficiency across various car makes. Each circle’s x-position maps to horsepower, y-position to torque, radius encodes highway mpg, and color distinguishes the manufacturer. It uses d3.scaleLinear for axes and bubble size, d3.scaleOrdinal with interpolateTurbo for color coding, and d3.axisBottom/axisLeft for ticks. Hovering reveals a tooltip showing the make, with opacity transitions for interactive feedback. The legend displays sample bubble sizes and color-coded manufacturer circles. Data comes from bubblechart.csv.