Answer:
P and U
Step-by-step explanation:
Since the graph is in front of you, a great quick way to tell if it's a function is if it passes the vertical line test - if you move a vertical line along the graph and the vertical line hits at most one point on the line every time.
Therefore the points that still leave this graph a function are the ones that are located where there isn't a line - P and U to be precise.
