Step-by-step explanation:
Ordered pairs: {9-5, 3), (4, 9), (3, -2), (0, 6)}
A function is a relation whose input has only one output. SO for any of the orderd pair in the option to be a function with the above ordered pairs, the input must not be the the same with the above.
a) It has an input of 4. we already have an input of 4 in the given orderd pair.
b) It has an input of -5. we already have an input of -5 in the given orderd pair.
c) It has an input of 2. There is no input of 2 in the orderd pair. Hence, it can be added to the set.
d) It has an input of 0. we already have an input of 0 in the given orderd pair.