The domain is {-8}
The range is {5,6,7,8}
The relation is not a function as the domain value -8 maps to multiple values. All domain values in a relation needs to map to exactly one range value for it be a function.
Answer:

Step-by-step explanation:
Set an equation:

Combine like terms:

Add 5 to both sides:

Divide both sides by 2:

