This line chart compares sales and profit values across a series of products. It uses D3 v7 to load a CSV file, map the data to points, and render two smooth monotone lines in blue and green, with circular markers for each product. The SVG visualization includes rotated category labels, horizontal grid lines, a legend, and interactive tooltips that appear on hover. The chart uses `d3.csv` with `d3.autoType`, `d3.scalePoint`, and `d3.axisBottom` to construct the axes and visual encoding.