This scatterplot compares countries by GDP per capita (x-axis) and Life Ladder score (y-axis), using the World Happiness Report dataset. Each circle encodes social support through its radius and healthy life expectancy through a blue sequential color scale (d3.scaleSequential). The chart renders as SVG, with axes via d3.axisBottom and d3.axisLeft, plus hover interactions that enlarge points. A gradient legend displays the color mapping, while tooltips (title elements) reveal detailed country-year values.