This interactive scatter plot shows the relationship between square footage and price for real estate listings across multiple cities, with each city assigned a distinct color in a legend. Built with D3 v7 and SVG, the visualization includes labeled axes and hover tooltips that display property details. The code uses `d3.csv` to load the in-memory data, `d3.scaleLinear` for both axes, and `d3.scaleOrdinal` with `d3.schemeSet2` for city-based coloring. Circle elements represent individual properties, and mouseover events trigger a transition-based tooltip update.