This example visualizes the relationship between student population and student-to-staff ratio in a scatter plot, with each circle representing a university. It loads CSV data from a GitHub URL, parses it, and maps the selected columns to x and y positions using D3’s `scaleLinear`. The chart uses `axisBottom` and `axisLeft` for axes, while circle colors come from `scaleOrdinal` (though the color mapping is static to species names not present in this dataset). The reusable `scatterPlot` function encapsulates the chart’s configuration, and SVG rendering is used throughout.