1/(x+1) + 1 isn't right, but it's of the right form. It's probably because someone saw that x/(x+a) curve and thought it looked close enough to logarithmic without bothering to check it.

I suspect the linear misconception came from looking at the damage needed to damage dealt ratio, which is in fact linear in a small range:

Battacor 100

But when you extend your view a bit you'll see that it is more of a piecewise made up of different linear growths:

Battacor 1000

So I'm much more willing to leave linear on the wiki rather than logarithmic. It may not be entirely accurate, but it's less confusing to the average reader.

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