{"version":"1.0","type":"rich","title":"activity6_task4q9","description":"This interactive bubble chart explores the relationship between population, urban population, and median age across various countries and years. Each circle’s x-coordinate maps to total population, its y-coordinate to urban population, with bubble size reflecting median age and color encoding the year of the data. Built with D3 v7, it employs `d3.scaleLinear` for continuous axes and bubble sizing, `d3.scaleOrdinal` with `d3.schemeCategory10` for categorical year colors, and uses `d3.axisBottom` and `d3.axisLeft` for axes. Hovering reveals a tooltip with the country’s exact statistics, while a legend identifies the color-year mapping. Data comes from the included `bubblechart.csv` file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/5ac4533639a54b838285b931404e44a4?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}