The directrix of a parabola is y=3y = 3y=3 and the focus is (0,−1)(0, -1)(0,−1). What is the vertex?
(0,1)(0, 1)(0,1)
(0,2)(0, 2)(0,2)
(0,−2)(0, -2)(0,−2)
(0,0)(0, 0)(0,0)