document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=885428>Question 885428</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Without graphing, tell whether the graphs of each pair of equations are paralell.  y = -7x-9 and -3y = 21x-9. I don't know how to go about showing my work step by step. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #535151 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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/cgi-bin/show-face.mpl?user=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=535151\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Rearrange each equation into the \"slope-intercept\" form:<BR>\n" );
document.write( "y = mx + b<BR>\n" );
document.write( "where m is the slope.<BR>\n" );
document.write( ".<BR>\n" );
document.write( " y = -7x-9<BR>\n" );
document.write( "this one is already in the form and the slope is -7<BR>\n" );
document.write( "and <BR>\n" );
document.write( "-3y = 21x-9<BR>\n" );
document.write( "dividing both sides by -3<BR>\n" );
document.write( "y = -7x + 3<BR>\n" );
document.write( "slope is also -7<BR>\n" );
document.write( ".<BR>\n" );
document.write( "since BOTH equations have the same slope, they are parallel </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );