This chart visualizes US cancer cases from 2009 to 2022, plotting the infant mortality rate against the year. It combines a black line representing the trend with a filled area beneath it to emphasize the data’s magnitude. The visualization uses D3 v5’s `scaleLinear`, `line`, and `area` generators, with `curveBasis` for smooth interpolation. Data is loaded from a CSV file via `csv()`, and axes are rendered with `axisBottom` and `axisLeft`. The SVG output includes labeled axes and gridlines, with the area chart styled in purple.