This example displays a scatter plot of seven circles positioned along a quadratic curve where each y-coordinate is the square of its x-coordinate (1, 4, 9, 16, 25, 36, 49). The visualization builds a full-viewport SVG via D3’s `select` and joined `join` operations, sizing it to the container’s dimensions, then renders the circles with `d3.r` set to 25 using the `renderCircles` function. The code separates setup and rendering into modular functions, importing data from a local `data.js` file that calculates coordinates with `Math.pow`.