A scatter plot shows how each U.S. state’s population change relates to its change in number of congressional representatives between 2010 and 2020, with circle size encoding each state’s 2020 population. The visualization uses D3 v5 with SVG rendering, employing `d3.scaleLinear` for both axes, `d3.scaleSqrt` for circle radius, and `d3.axisBottom` and `d3.axisLeft` with grid lines. Data is loaded via `d3.csv` from a GitHub Gist, with percentage tick labels formatted using `d3.format`.