{"version":"1.0","type":"rich","title":"Mobility Rate Bubble Chart","description":"A bubble chart displays California universities’ mobility rates (percent of students from bottom-quintile families reaching top-quintile incomes) against median parental income. Circle size encodes average cohort size; color encodes trend in bottom-40% parental share. D3 v5 filters CSV data from Opportunity Insights, uses `d3.scaleSqrt` for radii and `d3.scaleDiverging` for color, and renders labeled SVG circles with average reference lines via d3-legend.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/026bad465022471dabb6a243cb646db7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}