Answer:
Relation 1: Not a Function
Relation 2: Not a Function
Relation 3: Function
Relation 4: Not a Function
Explanation:
There can only be one output (what you get out of it) for each input (what you put into the function) in a function.
3
Step-by-step explanation:
1 yard is three feet
(-1, -2)
subtract 5-3 = 2
check 2+3 =5
B