PLEASE HELP WILL GIVE BRANILIEST does the following relation form a function if so how do you know

the relation is : (1,3) (5,6), (4, 3), and (2, 5)

Alicense plate is to consist of 44 digits followed by 55 uppercase letters. determine the number of different license plates possible if the first and second digits must be? odd, and repetition is not permitted.

Explain how you can use the associative property to evaluate (7x50)x4.

Which of the following is not a subset of {1,2,3}?