This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 30 car makes. Each circle’s position reflects horsepower (x-axis) and torque (y-axis), while its radius and color encode highway MPG and brand, respectively. Built with D3 v7 and SVG, the chart includes interactive tooltips on mouseover and a legend for bubble size and color categories. Data is loaded from an external CSV and rendered with animated transitions on hover.