Pick a depth. Each prompt opens in your AI pre-loaded with the lesson. Click a row to preview the prompt.
A number in a cell convinces you; a chart convinces everyone else in two seconds. But most people reach for the wrong chart - a pie with 14 slices, a 3D bar that distorts, a line chart of things that are not over time - and it obscures the finding instead of revealing it. There is a simple default that almost always works: bar charts for comparing categories, line charts for change over time. Getting the right chart is a real decision, not decoration, and it is worth learning the default now even though Module 6 goes deep on chart choice. AI is a good second opinion here - describe your data and it will tell you which chart fits and why - but the two-word rule (bar for comparison, line for time) will carry you most of the way.
Back to the coffee shop: your finding is Saturday averages 380 dollars and Wednesday 540 - a comparison between two categories, so the default is a bar chart. Set up a tiny two-cell table: type 'Saturday' in E1 and 380 in F1, 'Wednesday' in E2 and 540 in F2. Select E1:F2, then Insert > Chart. Google Sheets guesses a chart type; in the Chart editor on the right, under 'Chart type,' pick 'Column chart' (vertical bars). Now the bars visibly differ - Wednesday's bar is clearly taller - and anyone glancing at it gets the finding instantly. Give it an honest title by clicking the chart title text and typing 'Average revenue per day: Wednesday vs Saturday.' If instead your question were about a trend - 'is revenue growing month over month?' - you would have Month in one column and Revenue in the next and choose a line chart, because time on the horizontal axis with a connecting line shows the direction at a glance. When unsure, ask AI: 'I want to compare average revenue for two weekdays. Bar or line chart, and why?' It will say bar, because the two weekdays are categories, not points in time - a line between them would falsely imply Saturday flows into Wednesday. Resist pie charts unless you are literally showing parts of one whole (like 40 percent of revenue from one product), and never use more than about five slices.