This line chart shows a week of temperature readings for San Francisco, plotting date and temperature as continuous variables with points connected by a smooth curved path. The visualization loads CSV data from a GitHub gist, parses dates and numeric values, and renders the chart using d3.scaleTime, d3.scaleLinear, d3.axisBottom, d3.axisLeft, and a d3.line generator with curveBasis. Custom CSS styles the maroon line, axis ticks, labels, and title within an SVG canvas.