Answer:
Yes, this is a function.
Step-by-step explanation:
To have a function, each value used for the x-coordinates can be used only once.
Let's look at all the x-coordinates: -5, -3, -1, 1, 3, 5.
All x-coordinates are different. No value in the x-coordinates is used more than once.
Answer: Yes, this is a function.
