document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1199457>Question 1199457</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The equation of the perpendicular bisector of the line segment joining the points P<BR>\n" );
document.write( "(7,4) and Q (a, b) is 4x + 3y - 15 = 0. The point Q is:  </SPAN>\n" );
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document.write( "The equation of the perpendicular bisector of PQ is 4x+3y-15=0, or y=(-4/3)x+5.<br><BR>\n" );
document.write( "The slope of the perpendicular bisector is -4/3, so the slope of PQ is 3/4.<br><BR>\n" );
document.write( "I'll outline the process for solving the problem and let you fill in the details.<br><BR>\n" );
document.write( "(1) Use the given point (7,4) and the slope of 3/4 to find the equation of line PQ.<BR>\n" );
document.write( "(2) Solve the pair of equations representing PQ and the perpendicular bisector to find the point of intersection.  (You should find it is (3,1); that point is the midpoint of PQ).<BR>\n" );
document.write( "(3) Use the coordinates of P and the midpoint of PQ to find the coordinates of Q.  (You should find it is Q(-1,-2)).<br><BR>\n" );
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