Answer
vertical stretch
Work Step by Step
RECALL:
The graph of the function $y=a|x|$ involves a:
(i) vertical stretch of the parent function $f(x)=|x|$ if $|a|\gt1$; or
(ii) vertical compression of the parent function $f(x)=|x|$ if $0\lt |a|\lt 1$
The given function has:
$$|a|=\left|-\frac{7}{2}\right|=\frac{7}{2}$$
Since $|a|=\frac{7}{2}\gt 1$, then the graph of the given function involves a vertical stretch of the parent function $y=|x|$.
