This example shows a car price area chart, displaying a univariate trend over time with a shaded region beneath the line. The visualization uses D3.js v6, with `d3.area` and `d3.line` generators to construct the shape, while `d3.scaleTime` and `d3.scaleLinear` map data to the x- and y-axis. The chart reads data from an external source and renders it into an SVG container defined in the HTML. Axes are drawn using `d3.axisBottom` and `d3.axisLeft`, providing clear temporal and price references.