Finding Asymptotes of Hyperbolas
For the hyperbola $$\dfrac{(x - h)^2}{a^2} - \dfrac{(y - k)^2}{b^2} = 1$$ The asymptotes are $y - k = \pm \dfrac{b}{a}(x - h)$.
You could leave your answer as $y - 2 = \pm \dfrac{3}{4}(x + 1)$, or write two separate equations.
Edit... If you do write separate equations, you'll have
$y - 2 = \dfrac{3}{4}(x + 1)$ and $y - 2 = - \dfrac{3}{4}(x + 1)$, which are, in "slope-intercept form":
$y = \dfrac{3}{4} x + \dfrac{11}{4}$ and $y = - \dfrac{3}{4}x + \dfrac{5}{4}$
Hint: Your hyperbola is the standard hyperbola $\frac{x^2}{16}-\frac{y^2}{9}=1$, moved one unit to the left and $2$ units up. So write down the asymptotes of $\frac{x^2}{16}-\frac{y^2}{9}=1$, and move them in the same way.
Added: The asymptotes of $\frac{x^2}{16}-\frac{y^2}{9}=1$ are, as you know, $\frac{y}{3}=\pm \frac{x}{4}$. So the asymptotes in your case are $$\frac{y-2}{3}=\pm\frac{x+1}{4}.$$ The "plus" case simplifies to $y-2=\frac{3}{4}x+\frac{3}{4}$, then to $y=\frac{3}{4}x+\frac{11}{4}$.
The "minus" case simplifies to $y=-\frac{3}{4}x+\frac{5}{4}$.