Paul F. answered 07/16/17
Tutor
4.9
(259)
Highly Experienced Physics, SAT Math and Calculus Tutor
I calculate (1,3 ) for the vertex and (7,3) for the focus and x= -5 for the directrix
The distance focus to vertex = distance vertex to directrix = 6
That gives and equation of x-1 = 1/24 ( y-3 )^2