Directrix y = 8 It is a horizontal line so the parabola is vertical. <span>The focus (2, 4) lies below the directrix, Therefore parabola opens downwards. </span> <span>vertex will be halfway between focus and directrix, at (2, 6) </span> <span>focal length =p = distance between focus and vertex = 2 </span> <span>y = (-1/(4p))(x - 2)² + 6 </span> <span>y = (-1/8)(x - 2)² + 6 hope this helps</span>
