A line chart displays one week of temperature readings in degrees Celsius for San Francisco, with time on the x-axis and temperature on the y-axis. The visualization uses D3 v5 to load CSV data, parse timestamps, and render an SVG with scaled time and linear axes. The line path is drawn using `d3.line` with `curveBasis` smoothing, while axis labels and grid ticks come from `d3.axisBottom` and `d3.axisLeft`. Data originates from the Data Canvas - Sense Your City project.