This line chart tracks phone sales over time, with the x-axis representing years and the y-axis showing the number of phones sold. The visualization uses D3 v5’s `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `line` generators to render an SVG path, with grid lines and labeled axes. Data is loaded from a CSV file via `d3.csv` and parsed into date and numeric values, then rendered inside a centered SVG element with margins and a title.