document.write( "Question 1057054: If the point (1,2) is the on the graph of the function f, then what point must be on the graph of f^-1? \n" ); document.write( "
Algebra.Com's Answer #672171 by Edwin McCravy(20059)\"\" \"About 
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document.write( "The inverse of the point (1,2) which is found\r\n" );
document.write( "by interchanging the two coordinates (2,1).  It\r\n" );
document.write( "always amounts to a reflection in the 45-degree\r\n" );
document.write( "line through the origin, the line whose equation is \r\n" );
document.write( "y = x.  The red curve and the green curves below\r\n" );
document.write( "are inverses of each other.  The red curve is the\r\n" );
document.write( "graph of f and green curve is the graph of f-1.\r\n" );
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document.write( "The dotted blue line is the line y = x, which is \r\n" );
document.write( "often called \"the identity line\".  The graph of f, \r\n" );
document.write( "the red curve, contains the point (1,2) and the \r\n" );
document.write( "graph of f-1, the green curve, contains \r\n" );
document.write( "the inverse point (2,1), where the coordinates are\r\n" );
document.write( "interchanged.\r\n" );
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document.write( "Edwin
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