This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across various car makes. Each bubble’s position reflects its horsepower and torque values, while its size encodes highway MPG and its color distinguishes the manufacturer. Built with d3.v7, the visualization uses a linear scale for bubble radius and an ordinal color scale based on the make. Interactive tooltips appear on hover, displaying the make name. The chart includes axes, labels, and a legend indicating the MPG scale. Animated transitions in tooltip opacity are implemented via d3’s transition API.