This proportional symbols map displays housing costs for U.S. states using circles overlaid on a geographic map. The visualization uses D3 v6 with d3.geoPath and d3.geoAlbers for map projection, along with d3.legendSize for the size legend. Data is loaded from a CSV file hosted on GitHub, with circle colors distinguishing top-ten ranked states (blue) from others (green). Interactive tooltips appear on mouseover to show the precise housing cost for each state.