SAT Question e3d49511: Ratios Rates Proportional Relationships And Units answer and explanation with Desmos solution

Choice A is correct. It's given that there are $2,358$ raccoons in a $131$ -square-mile area. The estimated population density, in raccoons per square mile, is the estimated number of raccoons divided by the number of square miles. Therefore, the estimated population density of this area is $\frac{2,358\text{raccoons}}{131\text{square miles}}$, or $18$ raccoons per square mile.