This scatterplot from the Gapminder dataset shows life expectancy versus GDP per capita for countries in 2007, with circle size encoding population and color encoding continent. It uses Svelte and renders SVG via D3's `scaleLinear`, `scaleSqrt`, and `scaleOrdinal`. A Voronoi overlay, computed with `Delaunay.from` and `voronoi.renderCell`, captures mouse movement to trigger tooltips displaying country name and life expectancy.