Respuesta :

Answer:

the answer is d

Step-by-step explanation:

the x values don't repeat so therefore It is a function.

Answer:

D

Step-by-step explanation:

It's D bc you can have two of the same inputs equaling differnt outputs. You could of it as 4+3 = 7, 9, 2, and 1 or whatever numbers, its not true it only equals 7. Hope that helps