This line chart shows temperature readings in San Francisco over a week, with time on the x-axis and temperature on the y-axis. The visualization uses d3’s `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and a `line` generator with `curveBasis` to render a smooth maroon path. Data is loaded from an external CSV file via `d3.csv`, and the SVG output includes labeled axes and a title. The chart also employs `extent` for domain calculation and `nice()` for cleaner axis intervals.