Your exam technique
Select the major features → compare accurately → remove unsupported interpretations.
Select a useful organising principle
High-quality reporting makes the most important features easy to see. Group categories by a shared pattern or a useful contrast, then support the overview with enough evidence. Do not let a long list of figures obscure the larger changes.
Respect what the data cannot show
Two observations show a change between points, not a steady change throughout the period. Avoid steadily unless intermediate observations support it. Keep the measure clear and distinguish a change in percentage points from a proportional change. Check that every comparison uses compatible units and periods.
Avoid this common mistake
Two endpoints do not show that a change was steady. Check each adjective and comparison against the information actually supplied, including the limits of that information.
See it in practice
Starting point
The share rose steadily every year from 20% to 35%, according to two observations ten years apart.
Using this skill
The share rose from 20% to 35% between the two recorded years.
Two endpoints do not establish what happened in every intervening year.