This line chart visualizes the history of average prime lending rates in the United States from 1956 to the present, with each year’s average rate plotted against time. The SVG rendering uses d3.csv to load the dataset from a GitHub Gist, then applies d3.scaleLinear for both axes, d3.axisBottom and d3.axisLeft for tick marks, and a d3.line generator with curveBasis to create the smooth blue path. The chart includes labeled axes for year and rate, with gridlines extending across the plot area.