This visualization shows Facebook’s annual user counts from 2008 to 2017 as a combined line and area chart. A dark line traces the growth trend while a pink filled area beneath it emphasizes the cumulative scale. The chart uses D3 v5’s `line()` and `area()` generators with a `curveBasis` interpolation, alongside `scaleLinear` for both axes. Data is loaded from a remote CSV via `d3.csv`, and the SVG rendering includes custom axis labels, tick formatting, and colored gridlines.