This chart visualizes a week of temperature readings in San Francisco using a line graph overlaid on a scatterplot-style axis. The data comes from a CSV file loaded via `d3.csv`. The visualization uses `d3.scaleTime` and `d3.scaleLinear` to map timestamps and temperatures, with `d3.axisLeft` and `d3.axisBottom` for the axes. A smooth curve is drawn using `d3.line` with `curveBasis`, and the SVG rendering includes gridlines and clear axis labels.