Answer
The graph of the given function involves a vertical stretch by a factor of $3$ of the parent function $y=|x|$.
Refer to the blue graph below.
Work Step by Step
RECALL:
The graph of the function $y=a|x|$ involves a vertical stretch by a factor of $|a|$ of the parent function $y=|x|$.
The given function has $a=3$ where the graph of $y=3|x|$ involves a vertical stretch by a factor of $3$ of the parent function $y=|x|$.
To graph the given function, vertically stretch the graph of $y=|x|$ by a factor of $3$.
This can be done by multiplying each $y$-value of $y=|x|$ by $3$ (while retaining the value of $x$).
Refer to the blue graph above.