This example visualizes the rise and fall of technological expectations over time, plotting a line chart of closing values against yearly dates. Circle markers highlight each data point, while red text labels annotate the phase of the hype cycle, such as "Technology Trigger" and "Trough of Disillusionment." The chart uses d3.scaleTime and d3.scaleLinear to map data to SVG coordinates, with d3.line and d3.curveMonotoneX generating the smoothed path. Axes are rendered via d3.axisBottom and d3.axisLeft, and date parsing relies on d3.timeParse.