This example reproduces a marks and channels graphic as a static SVG. It displays three scatterplots that demonstrate how visual encodings, such as position, color, and size, map to data values. The plots use grey axes and reference lines, with blue circles as the primary marks. The SVG is constructed with nested `<g>` groups and `transform` attributes to create the layout. The code uses standard SVG elements like `circle`, `line`, and grouping, with styling defined in the CSS file. The rendering is purely SVG, without any JavaScript libraries or data processing.