Answer
See graph and explanations.
Work Step by Step
Step 1. Graph the equation as shown in the figure.
Step 2. Based on the given equation, we have $p=\frac{12}{4}=3$. The negative sign in the equation indicates that the directrix is above the focus.
Step 3. As the vertex is at $(2,-1)$, the focus is at $(2, -1-3)$ or $(2,-4)$ and the directrix is $y=-1+3=2$ as shown in the figure.
