A choropleth map of the United States visualizes home price performance by state, with states colored according to their seasonally adjusted one-year price change. Overlaid orange circles represent major cities, sized by population, providing additional housing market context. The visualization uses D3.js v7 with `d3.geoAlbersUsa` projection and `d3.geoPath` to render TopoJSON state boundaries from the us-atlas package, while a custom SVG tooltip displays detailed state and city metrics on hover. State data comes from a CSV file ranking performance across multiple time periods.