Answer:
I don't know about 4 but of no. 6, it is A
Step-by-step explanation:
the initial statement is:

and then:

So the second statement is false because f should be multiply by e, not by d so is option C)
I think you solved it on your own because x is 82
Answer:
not a function
Step-by-step explanation:
3 - 2 = 1
2 - 5 = -3
5-6 = -1
6-7 = -1