Find the Domain and Range $\begin{array} { l } 4 \rightarrow 12 \\9 \rightarrow 27 \\14 \rightarrow 42 \\19 \rightarrow 57\end{array}$

Multiple Choice

Find the domain and range.
-three times a number
$\begin{array} { l } 4 \rightarrow 12 \\9 \rightarrow 27 \\14 \rightarrow 42 \\19 \rightarrow 57\end{array}$

A) Domain: {4,12,9,27} ; range: {14,42,19,57}
B) Domain: {4,9,14,19} ; range: {12,27,42,57}
C) Domain: {4,9,14,19,12,27,42,57} ; range: {4,9,14,19,12,27,42,57}
D) Domain: {12,27,42,57} ; range: {4,9,14,19}