A scatter plot displays hourly temperature readings over a week, using a time-based x-axis and a linear y-axis for degrees. Built with React and D3 v5, it renders circles as SVG marks, with axes generated by custom components. The data comes from a CSV file of San Francisco temperatures, loaded via `d3.csv`. Scales are created with `d3.scaleTime` and `d3.scaleLinear`, and tooltips are provided by native SVG `<title>` elements showing formatted time values.