PLEASE PLEASE HELP ILL GIVE U BRAINEST

Answer:
I only / 1 only
Step-by-step explanation:
Function rules: no same x-values and must pass vertical line test
1: all different x-values
2: has two of the same x-values
3: doesn't pass vertical line test
Hopefully this helps!
Brainliest please?
Answer:
1 only (I hope im right)
Step-by-step explanation:
Hope this helps:)