document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1021599>Question 1021599</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Are these lines parallel <BR>\n" );
document.write( "y=-7x-9<BR>\n" );
document.write( "-3y=21x+7<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #637325 by </B><A HREF=/tutors/aboutme.mpl?userid=engsaoudah><B>engsaoudah(9)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=engsaoudah><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=637325\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y=-7x-9<BR>\n" );
document.write( "-3y=21x+7<BR>\n" );
document.write( "these two lines are parallel because they have the same gradient when you write the second equation in the form y=MX+C\r<BR>\n" );
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document.write( "-3y=21x+7<BR>\n" );
document.write( "divide by -3<BR>\n" );
document.write( "y=-7x-7/3\r<BR>\n" );
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document.write( "m=gradient x=x-axis C=y-intercept y=y-axis\r<BR>\n" );
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document.write( "m=-7 in both cases so the lines are parallel. </SPAN>\n" );
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