A parabola has a vertex at the origin. The focus of the parabola is located at open paren negative 2 comma 0 close paren Which is the equation for the directrix related to the parabola?

The focus is 2 units left of the vertex, so the parabola opens horizontally to the left. The directrix is the same distance from the vertex on the opposite side, so it is the vertical line x = 2. The correct choice is x is equal to 2.

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