The solutions needs to fall inside the shaded region. The three blue dots do.
(-3, -3)
(-4, -1)
(-2, -1)
Two of the red dots clearly do not, so they're out. The one red dot falls on the intersection of the two lines. It is also excluded as an answer, because of the dashed line. The dashed line means points on are that line are not solutions. If both lines had been solid, then this point would have been included.
