A scatter plot displays the relationship between the number of housing sales and their average price across the United States. Each red circle represents a data point from a CSV file loaded via `d3.csv`. The visualization uses `d3.scaleLinear` for both axes, `d3.axisBottom` and `d3.axisLeft` for tick marks, and SVG circles rendered with `d3.selectAll` and `.enter()`. Titles and axis labels are added as SVG text elements, with the chart styled using a white background and rounded corners.