{"version":"1.0","type":"rich","title":"Fun with Vega-Lite API Template","description":"A line chart shows the U.S. 30-year fixed-rate mortgage average from the St. Louis Fed, drawn with the vega-lite-api library. The visualization uses a time-encoded x-axis and a quantitative y-axis without a zero baseline to emphasize rate fluctuations. Data loads asynchronously via d3.csv from a Gist, and the chart renders to SVG with a custom config for larger axis labels and tooltips. Vega-Lite API registers Vega, Vega-Lite, and d3, while vega-tooltip provides interactive hover details for each date and rate value.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f004286487cf47a583f282e0ceb9354f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}