This visualization shows how San Francisco's temperature varies over a week, plotted as a smooth, curved line across a time-series graph. The curve is generated using D3 v5's `line()` and `curveNatural` functions, with React handling the SVG rendering. Data is loaded from a CSV file using `d3.csv`, and scales are created with `d3.scaleTime` and `d3.scaleLinear`. The bottom and left axes are custom React components, while the line itself is drawn as an SVG path within a `<g>` element.