Answer:
Domain: {2, 4, 5, 9}
Range: {-2, 0, 2, 4}
Function: No
Explanations:
Note the following points:
The domain of a relation/function is a set that contains all the inputs. That is, all the values of x
The range of a relation/function is a set that contains all the outputs. That is, the values of y
A relation is a function if each value of the input (x in this case) is mapped to just one value of the output (y)
Therefore, in this exercise:
Domain: {2, 4, 5, 9}
Range: {-2, 0, 2, 4}
Function: No
The relation is not a function because each of 5 and 9 in x are mapped to more than one value of y