document.write( "Question 607800: Find the vertex, the focus and directrix of each equation.
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Algebra.Com's Answer #382896 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Note:
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document.write( "the vertex form of a parabola opening up or down,  where(h,k) is the vertex.
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document.write( "The standard form is , where  the focus is (h,k + p)
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document.write( "y = (1/4)x^2, Vertex(0,0), focus(0,1) Directrix y=-1
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document.write( "the vertex form of a parabola opening right or left,  where(h,k) is the vertex.
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document.write( "The standard form is , where  the focus is (h +p,k )
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document.write( "x =  (1/2)y^2 , Vertex(0,0), Focus(1/2,0): 2 = 4p, p=1/2 directrix: x = -1/2
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document.write( "See below descriptions of various conics\r
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document.write( "Standard Form of an Equation of a Circle is  
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document.write( "where Pt(h,k) is the center and r is the radius\r
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document.write( " Standard Form of an Equation of an Ellipse is  where Pt(h,k) is the center.
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document.write( " a and b  are the respective vertices distances from center and ąare the foci distances from center\r
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document.write( "Standard Form of an Equation of an Hyperbola opening right and  left is:
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document.write( "   where Pt(h,k) is a center  with vertices 'a' units right and left of center.\r
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document.write( "Standard Form of an Equation of an Hyperbola opening up and down is:
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document.write( "   where Pt(h,k) is a center  with vertices 'b' units up and down from center.\r
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document.write( "\n" );
document.write( "the vertex form of a parabola opening up or down,  where(h,k) is the vertex.
\n" );
document.write( "The standard form is , where  the focus is (h,k + p)\r
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document.write( "\n" );
document.write( "the vertex form of a parabola opening right or left,  where(h,k) is the vertex.
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document.write( "The standard form is , where  the focus is (h +p,k ) \n" );
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