POPULATIONGROWTH The accompanying graph shows how a population Pof fruit flies (Drosophila...

POPULATIONGROWTH The accompanying graph shows how a population Pof fruit flies (Drosophila)changes with time t(days) during an experiment. Use the graph to estimate the rate at which the population is growing after 20 days and also after 36 days. At what time is the population growing at the greatest rate?

EXERCISE 44 Growth curve for a population of fruit flies. Source: Adapted from E. Batschelet, Introduction to Mathematics for Life Scientists,3rd ed., New York: Springer-Verlag, 1979, p. 355.