A scatter plot visualizes the relationship between export values from two countries, with the United States on the x-axis and Japan on the y-axis. A dropdown menu lets users change the x-axis variable among the dataset's columns. The visualization uses d3.scaleLinear, d3.extent, d3.axisLeft, and d3.axisBottom to generate scales and axes, rendering circles as SVG elements. Data comes from a CSV file of worldwide exports spanning 2000-2016, parsed with d3.csv.