This bubble chart displays the relationship between total population and urban population across 35 countries, with bubble size encoding each nation’s yearly urban population change percentage. The visualization uses a categorical color scheme from Tableau to distinguish countries, accompanied by interactive tooltips that reveal precise figures on hover. Built with D3.js v7, the chart employs SVG rendering with three distinct scales: linear scales for both axes, a square-root scale for bubble sizing, and a legend for color coding. Data is loaded from a CSV file containing population statistics for global countries.