This line chart shows a week of temperature readings in San Francisco, with time on the x-axis and temperature on the y-axis. The visualization uses a filled area path with a smooth curve (via d3.area and curveBasis) to emphasize the temperature trend. The chart is rendered as SVG using d3.scaleTime and d3.scaleLinear for the axes, with d3.axisLeft and d3.axisBottom providing the tick marks. Data is loaded as CSV from an external GitHub gist, then parsed and bound to the scales.