document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=722885>Question 722885</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the slope if it exists of each of<BR>\n" );
document.write( "these lines (a) X=-8 (b) Y=-9 (c) X=Y? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #442922 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=442922\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the slope if it exists of each of<BR>\n" );
document.write( "these lines <BR>\n" );
document.write( "(a) X=-8<BR>\n" );
document.write( "That's a line thru (-8,0)<BR>\n" );
document.write( "x = -8 for all values of y<BR>\n" );
document.write( "It's parallel to the y-axis, so its slope is infinite, or undefined.<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "(b) Y=-9<BR>\n" );
document.write( "It's parallel to the x-axis thru (-9,0)<BR>\n" );
document.write( "y doesn't change, so slope = zero<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "(c) X=Y?<BR>\n" );
document.write( "y = x<BR>\n" );
document.write( "In slope-intercept form that's y = 1x + 0<BR>\n" );
document.write( "slope = 1<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );