This visualization shows how the populations of eight Massachusetts South Shore towns changed from 2000 to 2023, drawing on CSV data that includes yearly population figures and year-over-year changes. It displays multiple lines on a single chart, with each town color-coded and matched to a legend below, making it easy to compare trends like Weymouth’s sharp increase or Hull’s relative stability. The chart uses React to manage state and D3 v7’s `scaleLinear`, `line`, `axisBottom`, and `axisLeft` APIs to build the axes and plot the curves. Population values are formatted with commas via `tickFormat` and `toLocaleString`.