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A population’s instantaneous growth rate is the rate at which it grows for every instant in time. Function r gives the instantaneous growth rate of a fruit fly population x days after the start of an experiment.

Consider the graph of function r.

Use the graph to complete each statement.

Function r has
and
. Based on the instantaneous growth rate, the population decreased
days and the population increased
days.

$$r(x) = 0.05 (x^{2}+1 )x-6$$