{"version":"1.0","type":"rich","title":"activity_6_task_4","description":"This bubble chart visualizes California housing data, plotting longitude and latitude coordinates to reveal geographic distribution. Each bubble’s size encodes population, while its color represents median house value on a gradient scale. The chart uses D3.js v6 with SVG rendering, including `scaleLinear` for axes, `scaleSqrt` for bubble sizing, `scaleSequential` with `d3.interpolateCool` for the color mapping, and `d3.axisBottom` and `d3.axisLeft` for labeled axes. Data loads from a GitHub-hosted CSV, with a legend displaying the value range.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c1c260802c9d4a0a9c4470edf0f26d6e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}