7. Given the directed line segment $P Q$ with the coordinates of the starting point $P$ and the end point $Q$ being $(-1,1)$ and $(2,2)$ respectively. If the line $l: x+m y+m=0$ intersects the extension of $P Q$, then the range of values for $m$ is $\qquad$ .
The line $l$ passes through the fixed point $(0,-1)$. Note that $k_{l}=-\frac{1}{m}$, $k_{P Q}=\frac{1}{3}, k_{M Q}=\frac{3}{2}$. Therefore, $\frac{1}{3}<-\frac{1}{m}<\frac{3}{2}$ $\Rightarrow m \in\left(-3,-\frac{2}{3}\right)$.