The solution to this system could possibly have this meaning: The x-value represents the number of weeks and the y-value represents the length in feet.
To locate the solution of the two linear graphs on the coordinate plane, you would plot the two equations as lines and find the point where they intersect.
To get exactly two solutions to this linear system, the two lines would need to intersect at two distinct points on the coordinate plane.
To get exactly three solutions to this linear system, the two lines would need to coincide with each other, resulting in infinitely many solutions.