Answer
$y=4x$
(see graph below)
Work Step by Step
A value of $k$ where $
3\lt k\lt4.5
$ is $k=4.$ Substituting $
k=4
$ in the direct variation model, $y=kx,$ results to the direct variation equation
\begin{align*}
y=4x
.\end{align*}
Using the table of values below, the graph of the direct variation equation above is derived.