Answer:
I can't see the graph but i can explain to you how to figure it out.
If you draw a vertical (up and down (y axis)) and it hits the line you graphed more than once, it is not a function. (A function does not have 2 y outputs for 1 x input).
If you need anymore help just let me know.
If this doesn't help you can send me the equation or graph so I can better explain.
(Also can I please have brainliest? I need it to level up!)