> Adoption = number of users

> Adoption rate = first derivative

If you mean with respect to time, wrong. The denonimator in adoption rate that makes it a “rate” is the number of existing businesses, not time. It is adoption scaled to the universe of businesses, not the rate of change of adoption over time.

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LPisGood 5 hours ago | parent [-]

The adoption rate is the rate of adoption over time.

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wtallis 5 hours ago | parent | next [-]

One could try to make an argument that "adoption rate" should mean change in adoption over time, but the meaning as used in this article is unambiguously not that. It's just percentages, not time derivatives, as clearly shown by the vertical axis labels.

	▲	brianshaler 4 hours ago \| parent [-]
		There's another axis on the charts.

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2 hours ago | parent | prev | next [-]

[deleted]

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pclmulqdq 5 hours ago | parent | prev [-]

Normally, the adoption rate of something is the percentage ratio of adopters to non-adopters.