9. Which of the following relations are functions? Choose all that apply. Assume that each different variable has a different value.

Answer:
1. Function
2. Not a function
3. Function
4. Not a function
Step-by-step explanation:
For each x there is a different y.
(c,e),(c,d), (c,b) - orderd pair since the x's are the same.
(a,b),(b,a),(c,c),(e,d) - function sice there are two different x's