The table gives population densities for ring-necked pheasants (in number of pheasants per acre) on Pelee Island, Ontario.
(a) Describe how the rate of change of population varies.
(b) Estimate the inflection points of the graph. What is the significance of these points?
t 1927 1930 1932 1934 1936 1938 1940
P(t) 0.1 0.6 2.5 4.6 4.8 3.5 3.0