This bubble chart displays sales performance for ten products, plotting revenue on the x-axis and profit on the y-axis, with bubble size encoding units sold. The visualization uses a linear scale for both axes and a third linear scale to map units sold to bubble radii, with all bubbles rendered in steel blue with black outlines. The chart is drawn as an SVG using D3 v7, with axes and labels generated via `d3.axisBottom` and `d3.axisLeft`. Data is loaded from a CSV file using `d3.csv`, and circles are created with `.join('circle')` within an SVG group.