This dashboard visualizes New York State’s housing market across 62 counties, with a choropleth map showing median home prices, a bar chart ranking sales volume, and a line chart tracking three-year price trends. Users filter any view by clicking a county on the map, which instantly updates all other panels to show only that county’s data. The map uses `d3.json` to load TopoJSON boundaries, `d3.geoMercator` for projection, and `d3.scaleSequential` for color encoding. The bar chart uses `d3.scaleBand` and `d3.scaleLinear`, while the trend chart employs `d3.line` curves. A year selector drives reactive updates across all visualizations.