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23 July, 21:40

What is the equation of a parabola with a vertex at (0, 0) and a directrix x = - 4?

A. y equals negative one-sixteenth times x squared

B. x equals negative one-sixteenth times y squared

C. x equals one-sixteenth times y squared

D. y equals one-sixteenth times x squared

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  1. 23 July, 21:58
    0
    The general form for this is y^2 = 4ax where a = focus

    the directrix is same distabce behind the vertex as focus is in font so focus a = 4

    so we have y^2 = 16 x

    or

    x = (1/16) y^2

    Its C
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