Charts that persuade

Analysis nobody understands changes nothing. Data visualization is how insight becomes action.

Principles of clear charts

• One message per chart — what should the viewer take away?
• Right chart for the job — trends → line, comparisons → bar, relationships → scatter.
• Remove clutter — no chartjunk, honest axes.
• Guide the eye — color and annotation to highlight the point.

From chart to story

Structure a data story like an argument: context → insight → recommendation. Build dashboards that answer the stakeholder's real question at a glance.

Takeaway: the best visualization is the one that makes the decision obvious.