1. What do we call the set of all second elements in ordered pairs?

2. What is the set of all first entries in ordered pairs?

3. Which set of ordered pairs represents a function?

4. What is the relation of the set of ordered pairs {(2,-3),(1,-3),(2,3)}?

5. What is the relation of the set of ordered pairs {(-1,-1), (1,1), (-2,-2), (2,2)}.

6. Which among these is a function?

7. Which equation represents a function?

8. Which equation is NOT a function?

9. Which has a graph of function?

10. Is it true that a relation is said to be a function if the independent variable is determined by the dependent variable(s)?