Charts can communicate complicated information quickly, but presentation choices influence what a viewer notices. A steep-looking line or a dramatic headline may create an impression that deserves a closer look. Readers do not need advanced statistical training to ask a few useful questions.
Check the axes and units
Look at where a vertical axis starts, whether intervals are consistent and which units are being used. A cropped scale may emphasize a change visually. Ask whether the chart shows absolute numbers, percentages or a rate measured against another quantity.
Ask what is missing
A chart should identify its source, timeframe and population where relevant. A comparison can be misleading if groups differ substantially or if a very short period is presented as a long-term pattern. Important limitations should be visible beside the graphic.
Good data literacy starts with curiosity. Before sharing a striking visual, pause to check what it measures and what it leaves out.
