To know if (-5,5) is a solution to the system, this point should be in the intersection of the two graphs
This means that the point must be in the are where the red and blue colors overlap.
In this case, we can see that (-5,5) is not in the red and blue area
So, (5,-5) is not a solution because the point falls outside of the area with the overlap of shading
In the sketch, the black area is the are where red and blue overlap.
Where they overlap, is the solution. But the point (-5,5) is out of the area. So, Spencer is incorrect.
Correct answer: D.