Answer:
Step-by-step explanation:
Neither are a function because they do not pass the vertical line test.
Answer:
x = 11
Step-by-step explanation:

and check:

Answer: F (False)
Step-by-step explanation:
Jointly variation has the following form:
y=kxz
Where k is a constant of propotionality.
Substitute values:
If y=16, x=4 and z=2, then k is:

If x=-8 and z=-3 the the value of y is:

Then the answer is FALSE.