This bubble chart shows the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position encodes horsepower and torque on the x- and y-axes, while its radius scales with highway MPG and its color distinguishes the make. Built with D3 v7, the SVG uses `d3.scaleLinear` for axes and sizing, `d3.scaleOrdinal` for color, and `d3.interpolateTurbo` for the palette. Interactive tooltips appear on mouseover, and a legend displays the MPG scale and make colors.