A line chart displays one week of temperature data in San Francisco, with time on the x-axis and degrees Celsius on the y-axis. The visualization includes labeled axes and a smooth curve connecting the data points. Built with D3 v5, the code uses `d3.csv`, `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `line` with `curveBasis` to render the SVG chart. The dataset originates from Data Canvas - Sense Your City, a public sensor project.