This scatterplot compares GDP variation between the USA and Germany over time, using D3.js v5 to render an SVG visualization. A color legend with clickable artist labels filters the data points, dimming unselected countries to an opacity of 0.05. The chart includes custom axes with gridlines and labels, driven by `scaleLinear`, `axisLeft`, and `axisBottom`. Data is loaded asynchronously from a CSV file via `csv()` and processed in `loadData.js`.