Question

BRAINLIEST, THANKS AND 5 STARS IF ANSWERED CORRECTLY.

Answer 1

B has two pre-images of -7 so it is not a function

Answer 2

B. (-7, 3), (1, 2), (5, 3), (-7, 2)

Since  

x = − 7  produces  y = 3  and  y = 2

So the relation is not a function.