To determine if a relation is a function, we need to check if each input (x-value) is associated with exactly one output (y-value).
For "2 and 4," assuming this means a relation between the input of 2 and the output of 4:
If 2 is mapped to 4 and no other input is mapped to 4, then yes, it is a function because each input (2) is associated with exactly one output (4).
However, if both 2 and another number, say 3, are mapped to 4, then it would not be a function because 4 would have multiple inputs associated with it.
So, "2 and 4" is a function if 2 is uniquely mapped to 4.
