This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across different car makes. Each circle’s position encodes horsepower (x-axis) and torque (y-axis), while its size and color represent highway MPG and manufacturer. The visualization uses d3.csv to load data, d3.scaleLinear for axes and sizing, d3.scaleOrdinal with d3.interpolateTurbo for color mapping, and SVG circles with interactive tooltips on mouseover. A legend explains the MPG size scale, and all marks are rendered via d3.v7.