This example displays the average car price by brand as a single filled area, using a dataset of ten automotive manufacturers. The visualization encodes brands along the x-axis with a point scale and prices on the y-axis with a linear scale, producing a smooth area path that highlights price variations across brands. The chart is rendered as an SVG using D3 v7, with the area generated by the `d3.area()` generator and populated with axes via `d3.axisBottom` and `d3.axisLeft`. Light steelblue fills the area beneath the steelblue stroke, while rotated brand labels on the x-axis improve readability.