Which relations represent functions? Input
Output
3
5
-b
9
d
Input
Output
7
-3
y
5
Input
Output
John
52

The first and last represent functions, no function has an input with two separate outputs

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.