document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=389531>Question 389531</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me. I missed a week of school and I am so lost. I have this take home test that is due soon. <BR>\n" );
document.write( "So, the first problem is to write an equation of the perpendicular bisextor of the line segment whose endpoints are (-1. 1) and (7, 5) and there is also a grid provided for me but it is optional. Can you please explain this step by step so I could understand other math material. Thank you! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #276039 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=276039\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. First find the slope of the line segment then find the midpoint of the line segment<BR>\n" );
document.write( "Using the coordinates of the two end points, (-1,1) and (7,5),<BR>\n" );
document.write( "slope =&#8710;y/&#8710;x =(1-5)/(-1-7)=-4/-8 =1/2<BR>\n" );
document.write( "midpoint =  (x1+x2)/2,(y1+y2)/2=(-1+7)/2,(1+5)/2=(3,3)\r<BR>\n" );
document.write( "\n" );
document.write( "slope of perpendicular bisector = negative reciprocal or line segment = -2<BR>\n" );
document.write( "using this slope, the coordinates of the midpoint (3,3), and the point slope formula,y=mx+b<BR>\n" );
document.write( "3=-2*3+b<BR>\n" );
document.write( "b=3+6=9<BR>\n" );
document.write( "equation then becomes, y=-2x +9\r<BR>\n" );
document.write( "\n" );
document.write( "ans: the equation of the perpendicular bisector of a line segment whose endpoints are (-1,1) and (7,5)<BR>\n" );
document.write( "        is y=-2x+9 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );