This scatterplot visualizes Golden Gate Transit’s total monthly ridership from 2019 to 2020, highlighting the sharp decline caused by COVID-19. Each black circle represents a month, positioned by date and ridership count using d3.scaleTime and d3.scaleLinear, with axes rendered via d3.axisLeft and d3.axisBottom. The SVG is created with d3.select and sized to the full window. Data comes from a CSV file loaded asynchronously with d3.csv, and hover tooltips display exact ridership values via SVG title elements. The minimal black-and-white design emphasizes the trend without distraction.