Answer: B.
No, because one x-value corresponds to two different y-values.
Step-by-step explanation:
- A relation is said to be a function if each input value ( or x-value ) corresponds top a unique output value ( or y value).
For example : R ={(1,2), (2,4), (3,5), (7,5)} is a function since there exist only one unique value corresponding to each x-value.
In the given relation
x y
2 1
2 4
3 4
4 2
5 5
One x-value corresponds to two different y-values [ 2 corresponds to both 1 and 4]
That means, it is not a function.
Hence, the right option would be :
B.
No, because one x-value corresponds to two different y-values.
