This example presents a reusable scatter plot that maps daily visitors on the x-axis against sales on the y-axis, with each point sized by a fixed radius. The visualization loads CSV data from a GitHub gist, parsing numeric fields for day, sales, profit, orders, and visitors. Built with D3 v6, the code uses scaleLinear for axes, extent to compute domains, and axisLeft/axisBottom for rendering ticks. The scatterPlot function follows a reusable pattern, making it configurable via method chaining for width, height, margins, and data accessors, while SVG circles are joined to the DOM using selectAll and data.