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19 April, 05:02

A parabola with a vertex at (0,0) has a directrix that crosses the negative part of the y-axis. which could be the equation of the parabola? x2 = - 4y x2 = 4y y2 = 4x y2 = - 4x

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  1. 19 April, 05:12
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    Hello,

    Answer B : y=x²/4

    A: parabola is open downside (directrix (y>0))

    C: parabola is horizontal

    D: parabola is also horizontal
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