Most populations demonstrate growth, in which the population size increases exponentially until it levels off near the k value of the habitat for that species. intrinsic logarithmic logistic exponential extrinsic

Exponential growth then logistic growth as it levels off due to carrying capacity

bal is blood alcohol level. bac will normally be higher in a person with more body fat. so the answer to your question would be, as body fat decreases, the increasing rate of bal decreases.