This visualization shows hourly temperature readings in San Francisco over a week, displayed as a smooth line chart with a time-based x-axis and a linear temperature scale. The data is loaded from a local CSV file with d3.csv, then parsed and rendered using d3.scaleTime, d3.scaleLinear, and d3.line with curveBasis interpolation. Axis elements are generated with d3.axisBottom and d3.axisLeft, producing a clean SVG chart with labeled axes and gridlines.