A scatterplot tracks daily temperature readings over a week in San Francisco, with each point representing a timestamp and its corresponding temperature. The visualization uses React components to render SVG circles and axes, leveraging D3's `scaleTime` and `scaleLinear` to map data to coordinates. Data is loaded via `d3.csv` from a remote gist, with axis labels and tick formatting handled through custom React components like `AxisBottom` and `AxisLeft`. Hovering reveals the exact date via a native SVG `<title>` tooltip.