When looking at the four points, the first thing we can notice is that and lie squarely within the solution set, and the points and rest on the boundary lines. What does it mean when a line is dashed and when it is solid?
With the above in mind, we can conclude that is a solution to the system because it lies on a solid line. However, the point which lies on both a solid and a dashed line, is a solution to one of the inequalities but not a solution to the other. Therefore, does not belong with the others as it is not a solution.