A chart is a governed projection Output(Viz) = Project_G(T, S, B, L, Θ, A). Donut for share, Bar for rank, Scatter for multi-metric, Histogram for distribution, Venn for overlap, Area Stacked for trend. The math computes against the full event stream.
Date range
Preview slice: 20 of 20 events.
Chart laboratory — argmax picks
Live preview shows the slice; gate computes against the full stream. Pick the argmax for each chart type.
Preview Rev by category: Electronics=$108.88
Preview orders by browser: Chrome=2
Preview (orders, $rev) by category: Electronics=(2, $108.88)
Predict the full-stream values
Chart rules
Match each business question to its chart type:
Share of total (slice of pie)Top-N ranked categoriesTrend over timeMulti-metric overview per rowSegment overlap (where audiences intersect)Distribution of a metric across entities
Dynamic is the unlocked default — picking Dynamic for a locked chart is an error.
Stacked vs 100% Stacked:
Magnitude / total heightShare / proportion within each category
Bar chart axis mapping:
Evaluation
Practice checks are unlimited and don’t count toward your grade. Final submit is one-time and generates your certificate.
Practice the workspace, ask Dr. Okoye anything, and submit when you're ready. The grade lives in the workspace, not the chat.
