This line chart displays Facebook’s annual user counts from 2008 to 2017. The visualization uses D3 v5’s `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `line` functions to map the data. The SVG renders a single blue stroke path, with styled tick labels and axis titles, while the data is loaded from CSV files via `d3.csv` and parsed to a Date object for the time axis.