write and equation of the parabola when directix x=1

Answer 1

directrix = 1 means a horizontal opening parabola with axis of symmetry x=h where h = the x coordinate of the vertex

the parabola is either right or left opening. if a>0, then it's rightward opening. if a<0 then it's leftward opening

the parabola is of the form x = a(y-k)^2 + h where (h,k) is the vertex

the vertex is equidistant between the directrix and focus. the focus is (1/2 +h/2, k)

vertex = (h, k)

with some more information you could calculate the vertex, focus and parabola