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document.write( "Hi, \n" );
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document.write( "Using the vertex form of a parabola, (h,k) is the vertex \n" );
document.write( "(3,-1) is the vertex \n" );
document.write( "a = -1 parabola opens downward (vertex is a maximum) \n" );
document.write( "(0, -10) is where it crosses the y axis \n" );
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