This visualization uses the Vega-Lite API to plot Walmart store data, showing the relationship between unemployment rate and weekly sales, with points colored by holiday flag. The scatter plot encodes quantitative fields for both axes and uses a tooltip to display the weekly sales value for each point. The code registers Vega-Lite with a custom configuration for axis styling, loads the dataset via d3’s `csv` function, and renders an SVG that automatically fits the window size.