A pseudo bubble chart shows a series of black circles of varied sizes positioned over a Cartesian coordinate grid, with axes drawn as black lines and a title labeling the graphic. Based on the code in `index.html`, the visualization is hand-coded as an SVG using plain `circle`, `line`, and `text` elements, with a Roboto font typeface and no data-driven binding. The example, authored by kathrynrbernard in the v3 source, serves as a static mockup rather than an interactive chart.