This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for various car makes, with each circle’s position mapping to the first two variables and its size encoding fuel efficiency. Hovering over a bubble reveals the make via an interactive tooltip. Built with D3 v7, the SVG uses `d3.scaleLinear` for axes and bubble radius, `d3.scaleOrdinal` with `interpolateTurbo` for color coding, and includes a size legend. Data comes from the bundled `bubblechart.csv`, with hover effects and animation enhancing usability.