For the graph shown in the quetion,
the domain is the set of all possible input values (x values), while the range is the set of all possible output values (y values) that can be derived from the graph.
Therefore, we would have;
[tex]\begin{gathered} \text{Domain}=\lbrack-2,+\infty) \\ In\text{ interval notation this becomes;} \\ \text{Dom}=\lbrack-2\le x<\infty) \\ \text{Range}=\mleft\lbrace y\mright|y\le4,y\text{ }E\text{ R}\} \end{gathered}[/tex]
