Bubble chart
This bubble chart visualizes the relationship between average horsepower, torque, and highway MPG across different car makes, using data from a CSV file. Each circle’s position encodes torque and horsepower on the y and x axes, while its radius reflects highway MPG and its color distinguishes the manufacturer. Built with D3 v7, the SVG visualization includes hover tooltips and a legend showing MPG size scaling. The code uses `d3.csv`, `d3.scaleLinear`, `d3.scaleOrdinal`, `d3.axisBottom`, `d3.axisLeft`, and `d3.interpolateTurbo` for coloring.