UPSKILL MATH PLUS

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Let \(f = \{(x, y) | x, y \in \mathbb{N} \ \text{and} \ y = 2x\}\) be a relation on \(N\). Find the domain, co-domain, and range. Is this relationship a function?
 
Domain \(=\) i,i,i,i,...
 
Co-domain \(=\) i,i,i,i,...
 
Range \(=\) i,i,i,i,...
 
\(\mathbb{R}\) is .