This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes, with bubble size encoding fuel efficiency and color representing brand. Built with D3 v7, the SVG visualization uses d3.scaleLinear for axes and radius, d3.scaleOrdinal with d3.interpolateTurbo for categorical colors, and includes interactive tooltips on mouseover. A legend displays MPG values and make categories, with data loaded from a CSV file.