This bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes, using bubble size to encode MPG and color to distinguish brands. The interactive D3.js v7 visualization renders SVG circles in a scatterplot, with tooltips displaying each make on hover. Data is loaded from a CSV file, and the code implements linear scales, a color ordinal scale using `d3.interpolateTurbo`, and legend elements with `d3.axisBottom` and `d3.axisLeft`.