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If I plot them both on the same chart with the same y-axis (that’s the vertical axis), the number of Mormon temples is going to look really small and I won’t be able to see the variation over time in the number of temples, like this: However, the number of Mormon temples is in the hundreds while the number of Mormon stakes is in the thousands. (I’m a sociologist who studies religion you’ll just have to go with my examples.) Let’s say I want to see whether the number of Mormon temples being built aligns with the number of Mormon stakes (akin to a Catholic diocese) that are organized over time.
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While a bit technical, it’s occasionally useful to plot multiple data series that have very different scales in the same chart.
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