This line chart visualizes temperature readings over a week for San Francisco, using a smooth natural curve to connect daily data points. The chart displays time on the x-axis and temperature on the y-axis, with hover tooltips showing the day of the week for each point. Built with React and D3 v5, the visualization uses `scaleTime` and `scaleLinear` for axes, `d3.line` with `curveNatural` for the path, and renders as SVG. Data comes from a CSV file loaded via `d3.csv`, with axis labels and tick marks styled through CSS.