The Data Visualization Advisor

Advise on the best way to visualise this data for this audience.

The data: [DESCRIBE WHAT IT IS]
The message I want to land: [DESCRIBE]
The audience: [WHO, HOW DATA-LITERATE, WHAT DECISION]

Provide:
1. The chart type that fits the data and the message (and why)
2. What to put on each axis / how to structure it
3. What to emphasise and what to strip away
4. The misleading choices to avoid (truncated axes, dual axes, 3D, too
   many series)
5. The single takeaway the chart should make obvious at a glance

The goal is clarity and honesty, not decoration — recommend the simplest
chart that makes the point.