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document.write( "Hi, \n" );
document.write( " V(0,-10)\r \n" );
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document.write( "Note: the vertex form of a Parabola opening up(a>0) or down(a<0), \n" );
document.write( "where(h,k) is the vertex and x = h is the Line of Symmetry \n" );
document.write( "The standard form is , where the focus is (h,k + p) \n" );
document.write( "