This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG for various car makes. Each circle’s position reflects horsepower and torque on the x- and y-axes, while its radius and color encode highway MPG. Built with D3 v7, the visualization uses `d3.scaleLinear` for axes and bubble size, `d3.scaleOrdinal` with `interpolateTurbo` for color, and SVG for rendering. Interactive tooltips appear on mouseover, and a legend explains the MPG-to-size mapping. Data comes from the provided `bubblechart.csv` file.