This example shows weekly sales data from a Walmart dataset as an area chart, with the x-axis representing weeks 0 through 52 and the y-axis showing sales values up to 4 million. The visualization uses d3.scaleLinear for both axes, d3.axisBottom and d3.axisLeft for tick marks, and d3.area to render the filled region beneath the sales line. Data is loaded from a CSV file using d3.csv, and the SVG output includes labeled axes and a title. The chart is rendered entirely with D3 v5 into a static SVG element, with gridlines drawn via tickSize.