A bubble chart displays electronics products with screen size on the x-axis, price on the y-axis, and horizontal resolution scaled to bubble radius using `d3.scaleLinear`. Built with d3.v7 and rendered as SVG circles, each bubble is green with red strokes at 50% opacity. Mouse events trigger tooltips showing brand, resolution, processor speed, and price. Data loads from `bubblechart.csv`, and animations occur through D3 transitions on tooltip opacity.