This example plots population against rank using a scatter plot of steel-blue circles on an SVG canvas. The code loads CSV data via `d3.csv` and applies `d3.scaleLinear` for both axes, mapping rank to the x-axis and population to the y-axis. It renders circles with `d3.selectAll('circle').data(data).enter()`, and adds axes, labels, and a title using the standard `d3.axisBottom` and `d3.axisLeft` APIs. The data originates from a remote gist URL provided in the source.