You have to look at the inequality signs for each problem. #1 has signs without lines underneath them which means that the numbers outside of them which are -2 and 2, cannot be part of the possibe integers. anything in between in valid. For #2, since the left inequality sign has a line under it, the number outside it 3, can be included in possible integers, but 2 cannot because it is outside a sign without a line under it.
