There's not much here that needs a lot of brainpower. You are given a function and asked to graph it. The large numbers and high powers tell me that a graphing calculator would be a good option for doing this.
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If you want to find some points on the curve and plot it by hand, it is convenient to rewrite the function as
If the land is normally able to support 100 animals and there is a flood, the carrying capacity would drop because the number of plants would decrease because they would drown.