This bubble chart visualizes employee statistics for major tech companies, plotting revenue on the x-axis and employee count on the y-axis. Each circle’s size encodes market capitalization, its color distinguishes companies via a categorical scale built with `d3.scaleOrdinal` and `d3.interpolateViridis`. Data is loaded from a CSV using `d3.csv`. The SVG renders axes with `d3.axisBottom` and `d3.axisLeft`, and a tooltip appears on mouseover. A legend with dashed connector lines explains market-cap ranges, and hover interactions increase opacity.