This example demonstrates how different visual channels can encode the same quantitative data. Seven circles are horizontally positioned by value, with their size, position, and color all reflecting the data. The visualization cycles through three distinct encoding methods: length, where bars of varying height represent values; size, where circles use square-root scaling for area; and hue, which assigns categorical colors from `d3.schemeCategory10`. Built with D3 v7, it uses data joins and selection methods to render the SVG marks.