7. TBQ - Find the domain, codomain and range

Let \(X = \{10\), \(11\), \(12\), \(13\}\) and \(Y = \{2\), \(4\), \(6\), \(8\), \(10\}\) and \(\mathbb{R} = \{(10, 2)\), \((11, 4)\), \((12, 6)\), \((13, 8)\}\). Show that \(\mathbb{R}\) is a function and find its domain, co-domain, and range?

 

\(\mathbb{R}\) is not a functiona function.

 

Domain \(=\) $\left\{i,i,i,i\right\}$

 

Co-domain \(=\) $\left\{i,i,i,i,i\right\}$

 

Range \(=\) $\left\{i,i,i,i\right\}$