The integers in the set {3, -7, 1.25, 1/2, -3.2} are the whole numbers that can be positive, negative, or zero without any fractional or decimal components.
From the set, the integers are:
- 3
- -7
The other numbers (1.25, 1/2, and -3.2) are not integers.
Thus, the correct answer is: {3, -7}