This line chart displays one week of temperature data for cities around the world, sourced from Data Canvas - Sense Your City. Each line represents a city’s temperature over time, distinguished by color, with a legend to identify cities. The chart uses d3.scaleTime, d3.scaleLinear, d3.scaleOrdinal, d3.line with curveBasis, and d3.nest to group data by city. Axes are rendered with d3.axisBottom and d3.axisLeft. A custom colorLegend function creates the SVG legend.