Answer:
Options (1), (4) and (5) are the functions.
Step-by-step explanation:
Option (1)
In the given set of ordered pairs, for every input value there is a y-value which is either different or same.
They represent a many to one function.
Option (2)
In the given set of ordered pairs (4, 2) and (4, -2) represent different y-values for the same x-values.
Therefore, they don't represent a function.
Option (3)
Ordered pairs (-1, 8) and (-1, 12) show the different output values for same input values.
Therefore, this set doesn't represent a function.
Option (4)
In the given set of ordered pairs, for every input value there is a y-value which is either different or same.
They represent a many to one function.
Option (5)
In the given set of ordered pairs, for every x- value there is a y-value which is either different or same.
They represent a many to one function.
