In a bar graph representing rainfall by date, which element is classified as a measure?

In a bar graph displaying rainfall by date, the measure is essentially what is being quantified. Rainfall is a numerical value that can be counted or measured; it represents the amount of precipitation recorded on each specific date. This makes it a measure, as it provides a quantifiable statistic that can be analyzed in relation to time.

On the other hand, the date represents a categorical variable that serves as a reference point but does not carry inherent numerical value in this context. It's used to categorize the rainfall measurements rather than providing an amount itself. Therefore, in the context of a bar graph, rainfall is classified as the measure, while the date serves a different purpose, identifying the specific instances of measurement rather than being a measurement in itself.