This bubble chart shows the correlation between average horsepower, torque, and highway MPG for various car makes, using circle size to encode fuel efficiency and color to distinguish brands. The visualization includes an interactive tooltip that displays the make on hover, along with a legend for both the MPG scale and the color-coded categories. Built with D3.js v7, it loads data from a CSV file and renders SVG elements with animations for tooltip transitions, while axes and labels are generated using d3.scaleLinear and d3.axisBottom/axisLeft.