A scatter plot visualizes temperature readings over a one-week period in San Francisco, using time on the x-axis and temperature on the y-axis. The React-based example employs d3.scaleTime, d3.scaleLinear, and d3.extent to map data from the Data Canvas Sense Your City dataset. SVG circles represent individual measurements, with d3.timeFormat for weekday tick labels and native `<title>` elements for tooltips, demonstrating time-scale handling in D3 v5.