Respuesta :

Answer:

#1 is a function, #2 is a function, #3 is not a function, #4 is a function

Step-by-step explanation:

Answer:

2 yes, 3 no, and 4 yes

Step-by-step explanation:

When you are finding function you need to remember for every input there is only ONE output *hints (3,4)  (3,4) is not a function because there is the same output (4) for the one input(3)....The Y value can be the same number but the X value cannot. (X,Y)