This bubble chart shows the correlation between average horsepower, torque, and highway MPG across 31 car makes. Each circle’s position maps horsepower on the x-axis and torque on the y-axis, while circle radius encodes highway MPG and color distinguishes make. The visualization uses D3 v7 with SVG rendering, including a tooltip on mouseover, a legend for bubble size, and color-coded dots. Data is loaded from a CSV file and mapped through d3.scaleLinear and d3.scaleOrdinal scales.