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Re:Frighteningly Ambitious Startup Ideas (2012) by joshuamorton on Saturday May 20, 2017 @09:18PM (#14385263)
Indeed. However you also made it clear what you don't understand. Consider 1 person per year being born.

If you assume the growth rate is exponential, then you will see that the first year, the growth rate is 100%, the second year the growth rate is 50%, the third year the growth rate is 33% and so on. At any point, you can fit an exponential to the graph tangential to the current point. It won't fit much, but you can still do it.

A decreasing exponential may be exponential, but it also very well may not be. But we'll need to look a few years into the future to be sure. That said, expert opinion seems to be that growth rate is at this point linear (or iow an exponential that decreases each year so as to appear linear) [0]

[0]: https://ourworldindata.org/wp-content/uploads/2013/05/update...

Re:Frighteningly Ambitious Startup Ideas (2012) by dragonwriter on Saturday May 20, 2017 @09:27PM (#14385286)
> A decreasing exponential may be exponential

No, a "decreasing exponential" is not exponential. It might return to an exponential after the decreasing period, but during the period of decline, the growth is not exponential.

Re:Frighteningly Ambitious Startup Ideas (2012) by joshuamorton on Sunday May 21, 2017 @12:11PM (#14387885)
Fair.