SAT Question 9b0a4eae: Linear Equations In Two Variables answer and explanation with Desmos solution

Choice C is correct. It’s given that the graph in the xy-plane models the possible combinations of length $x$, in meters (m), and width $y$, in meters, for a rectangle with a perimeter of $36$ m. Since $x$ represents the length, in meters, and $y$ represents the width, in meters, the point $(8,10)$ in the xy-plane represents a rectangle whose length is $8$ m and whose width is $10$ m.