## Trigonometry (11th Edition) Clone

The relation is not a function. Domain: {$0,1,2$} Range: {$-4,-1,0,1,4$}
In a function, no two ordered pairs can have the same first component and different second components. In the question, two pairs of ordered pairs have the same first component and different second components. This means that the relation is not a function. The domain is the set of x-values: {$0,1,2$}. The range, on the other hand, is the set of y-values {$-4,-1,0,1,4$}.