A line chart shows temperature readings over one week in San Francisco, drawn as a smooth natural curve across time. The visualization uses React with D3 v5 scales and axes, including `scaleTime` for the x-axis and `scaleLinear` for the y-axis, rendering SVG elements. Data comes from the Data Canvas Sense Your City dataset, loaded via `d3.csv`, with time formatted as abbreviated weekdays. The chart includes labeled axes and a teal curve, with tick marks styled in muted gray.