SOLUTION: Write the equation of a parabola with a vertex at (0, 0) and a directrix y = -1.

 

Hi,

Recommend Sketching initially:vertex at (0, 0) and a directrix y = -1

Then using the general format to determine the equation:  

the vertex form of a Parabola opening up(a>0) or down(a<0),  

where(h,k) is the vertex  and  x = h  is the Line of Symmetry

The standard form is , where  the focus is (h,k + p)

and directrix is  y = -(h+p)