{"version":"1.0","type":"rich","title":"Assignment 10: histogram graph Black Hat","description":"A histogram visualizes the distribution of National Aviation System delays from a filtered airlines CSV dataset, revealing that delays cluster at low values with a few extreme outliers. Red bars represent bin counts, with hover tooltips showing exact ranges and frequencies. The chart uses D3.js v7 with `d3.histogram()`, `d3.scaleLinear()`, and `d3.axisBottom()`/`d3.axisLeft()`. Four d3-svg-annotation elements, including labels, callout circles, elbows, and rectangles, highlight peak delay zones and pose critical questions about systemic mismanagement.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/3a382ca55efa48bb8490ac3a087311c4?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}