01Tell whether values rose every year or only overallCompare each year’s value with the year before it to see whether a single fall breaks a claim that the values rose every year.
02Tell values that held steady apart from values that went up and downCheck whether each rise and fall is tiny next to the values themselves, which means the values stayed about the same.
03Check whether words like “doubled” and “slightly” fit the numbersCompare the last value with the first value to see whether it is about twice as much, about half as much, or only a little different.
04Compare how two groups changed over the same yearsSubtract one group’s value from the other’s in the first year and again in the last year to see whether the gap between them grew or shrank.
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