How do I determine the vertex, focus and directrix of a parabola?
Find the focus and directrix of the parabola {eq}y = \dfrac {1} {4} (x-3)^2 + 1 {/eq}. Step 1: Identify {eq}h, k, {/eq} and {eq}a {/eq} for the parabola in vertex form {eq}y = a (x-h)^2 + k
