{"version":"1.0","type":"rich","title":"Mobility Rate Bubble Chart","description":"This example shows a bubble chart of California universities, plotting median parent household income against mobility rate. Bubble size represents the average number of children per cohort, and color encodes the trend in the share of parents from the bottom 20% of the income distribution. The SVG rendering uses D3.js v5 with `d3.scaleSqrt` for radius, `d3.scaleDiverging` for color, and the d3-legend library. Data from Opportunity Insights’ Mobility Report Cards includes average lines and selected university labels.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/2ec29aac6ce34a30ba13c4abb256269b?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}