This line chart shows the cumulative number of VizHub users over time, from its launch in August 2018 through mid-2021. The visualization uses d3.v4 with an SVG rendering approach, employing date and user count data from a CSV file. Annotations created with d3-svg-annotation highlight notable growth events, such as the VizHub 2.0 Kickstarter and a data visualization course launch. The chart includes both a line and semi-transparent purple circles for each data point, with a time scale on the x-axis and a linear scale for user counts on the y-axis.