Answer:
Okay I haven't done this in awhile but okay so (1) if you are going off of the Y's then no it would be a function X's Yes its a function, (2) None of the dots are on the same area so like if you draw a line down from where each of the dots are and it touches another dot then its not a function, but lucky for you it is a function. (3) isn't function because if you can see number 9 have 2 lines going from it so its not (4) is a function because if you draw a bunch of lines and they don't go through the line in the middle your good. I hoped this helped you. Bye Bye.
Step-by-step explanation:
