This area chart compares cell phone prices from 2005 to 2017, using a smooth curve to show cost trends over time. The visualization uses React with D3 v5, rendering an SVG with an area fill and an overlaid line. It employs `scaleTime` for the month-based x-axis, `scaleLinear` for the cost y-axis, and `area` and `line` generators with `curveBasis` for smoothing. Data is loaded from a CSV file hosted in a GitHub gist, with date parsing applied via `d3.timeParse`.