This visualization displays temperature readings over time from the San Francisco week temperature dataset, plotting individual data points connected by a stepped line. Time appears on the x-axis using d3.scaleTime with weekday tick formatting, while temperature uses d3.scaleLinear on the y-axis. Built with React and d3.v5, the chart renders SVG elements including custom axis components, circles for data marks, and a curveStep path created via the d3 line generator. Tooltips on each circle reveal the timestamp when hovered.