Does the 25% increase mean linear or exponential growth? That is, does it add 0.25 each level, or does it multiply by 1.25 each level?
Specifically, is the sequence: 1, 1.25, 1.5, 1.75, ...
or is it: 1, 1.25, 1.56, 1.95, ...
It's linear like 1, 1.25, 1.5, 1.75, ...