A parabola has the following properties. vertex at (–2, 1) directrix is x = 5 which equation represents this parabola? startfraction 1 over 28 endfraction (x + 2) = (y – 1)2 28(x + 2) = (y – 1)2 –28(x + 2) = (y – 1)2 negative startfraction 1 over 28 endfraction (x + 2) = (y – 1)2