Write the equation of the directrix for the parabola -8(y-3)=(x+4)^2

Answer 1

x² = -4p * y is parabola with the vertex at (0,0) and opening down. p is the distance from the vertex to either the focus or directrix. In your equation, the vertex is at (-4,+3), and p is 2. Therefore the directrix is the line y = 5. CHECK by sketching the graph