I'd like to say logarithmically decreasing but it does not have to decrease to zero.
An example of an increasing function which flattens out at around 4.5%.
I'd like to say logarithmically decreasing but it does not have to decrease to zero.
An example of an increasing function which flattens out at around 4.5%.
I don't know what "flattens out" means (and your image doesn't load), but maybe you're thinking of functions of a variable $x$ which tend monotonically to a limit as $x$ tends to infinity. Having a "horizontal asymptote" is another common related term.