Question 877344: please help me,,, to find the standard form of a parabola given the vertex at the origin and directrix, x=2
Answer by josgarithmetic(39620)   (Show Source):
You can put this solution on YOUR website! The focus is on the other side of the vertex, so it is at (-2,0). The distance between a set of points to the point (-2,0) is the same as the distance between the set of points to the directrix of (2,y). That description is the definition for a parabola, and is the specific parabola which you want to find. Translate the description into an equation using the distance formula. Simplify that equation.
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