{"version":"1.0","type":"rich","title":"Tutorial 4.","description":"A bubble chart visualizes the correlation between GDP per capita, happiness score, and population for ten countries. Each circle’s position encodes economic output and subjective well-being, while its radius represents population size. The visualization includes axes, labels, a legend for population magnitudes, and interactive tooltips that display exact values on hover. It uses D3 v7 with SVG rendering, loading data from a CSV file and applying linear scales for position and bubble sizing.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f61cc1f2035a41459bab18c63ba96cb7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}