Answer:
Yes, as far as we know from the data given
Step-by-step explanation:
A function will have a single output for each unique input. The output does not have to be unique for each unique input.
If we had an example where a single input resulted in two or more different outputs, then that is not a function.
By example if the next term were x = 6 and y = -4, then that example would make it not a function as 6 would map to both -4 and +5
