A single line chart shows the monthly U.S. unemployment rate from 1948 to 2021, with the x-axis as a time scale for dates and the y-axis as a linear scale for the percentage rate. The SVG chart, built with d3.v7, uses `d3.csv` to load unemployment data, `d3.timeParse` to convert date strings, and `d3.line` to generate the steel-blue path. Axes are drawn with `d3.axisBottom` and `d3.axisLeft`, and the chart includes a title and axis labels.