1. 
Which of the following sets is NOT a relation?{(A, B), (Q, Z)}

2. 
What is the domain of the relation {(1, 2), (3, 4), (5, 6), (7, 8)}?{1, 3, 5, 7}

3. 
Which of the following ordered pairs is NOT in the relation described by the equation x^{2} + x – 6 = y^{2}?(3, 0)

4. 
Which of the following relations IS a function?{(1, 0), (2, 0), (3, 0)}

5. 
The following graph shows the relation {(0, 1), (0, 2), (0, 3), (0, 4)}

6. 
The following graph shows False

7. 
The graph shows a function. About 77% true, 23% false

8. 
The graph shows a function. True

9. 
The graph shows a function. True

10. 
The graph shows a function. True
