This area chart visualizes Apple’s revenue over a 20-year period using a smoothed curve and filled gradient. The chart employs d3.scaleTime, d3.scaleLinear, d3.axisBottom, d3.axisLeft, d3.line, and d3.area with curveBasis to draw the path. Data is parsed from a CSV file via d3.csv and timeParse, then sliced to show a subset. The SVG renders axes with gridlines, while CSS styles the line, area fill, and labels.