document.write( "Question 618495: How do you find the vertex, focus, directrix, and axis of symmetry of the parabola?\r
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Algebra.Com's Answer #388949 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi, re TY, note ommission on the minus.
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document.write( "x^2-2x+8y+9=0
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document.write( "  V(1,-1), 4p=8, p = 2 F(1,-3) 
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document.write( "  a = (-1/8) < 0    Parabola opens downward
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document.write( "Directrix y  = 1 and x = 1 is the axis of symmetry
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document.write( "See below descriptions of various conics                         
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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. (a positioned to correspond with major axis)
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document.write( " a and b  are the respective vertices distances from center and ąare the foci distances from center: a > b\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( "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)\r
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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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