We can choose one of this points to graphed to the given coordinate system
and makes relation which is not function
e.g. (-4, 2) , (-2, -4) , (0, 1) , (2, 2) , (4, 4) Why?
Definition of the function is - Every element of the starting set (domain-x) must be related to only one element of the second set ( codomain-range-y).
If you add any of this points e.g. (-4, 2) then you have an existing point on the graph (-4, -1)
In that situation you have coordinate x=-4 which is in relation with two coordinates y=2 and y=-1 and that is relation not function.
Good luck!!!