The graph of a relation is shown.

123456-1-2-3-4-5-6123456-1-2-3-4-5-6

The domain is x\displaystyle {x}\in (Enter your answer in interval notation)

 

The range is y\displaystyle {y}\in (Enter your answer in interval notation)

 

Is the relation a function of x\displaystyle {x}?