This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes, with each bubble’s position on the x- and y-axes encoding horsepower and torque, its radius scaling with highway MPG, and its color mapping to the manufacturer. Built with D3 v7, the SVG renders circles with a linear scale for size, an ordinal color scale using `d3.interpolateTurbo`, and interactive tooltips that appear on mouseover. A legend explains the MPG radius scale, while color-coded dots identify each make.