This multiline chart displays profit trends across regions over time, with each line representing a region and colored via a categorical scale. Built with D3 v5, the visualization uses `d3.nest` to group data by region, `d3.line` with `d3.curveBasis` for smooth paths, and custom axis and legend components. The data, sourced from Data Canvas - Sense Your City, is loaded from a CSV and rendered as SVG.