document.write( "Question 619017: 1. Identify the focus, directrix, and axis of symmetry of the parabola
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\n" ); document.write( " a. x^2/36 + y^2/16 =1
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Algebra.Com's Answer #389265 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "     a.  y= 1/2x^2    Or   2y = x^2  Opening Up: coefficient of x^2 >0
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document.write( "The standard form is , where  the focus is (h,k + p)  
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document.write( "V(0,0), F(0,.5) directrix is y = -.5 and axis of symmetry is x= 0
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document.write( "     b. y^2 = 16x   below...Opening Right: coefficient of y ^2 >0,V(0,0) p = 4
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document.write( "The standard form is , where  the focus is (h +p,k )\r
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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 )\r
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