document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=44432>Question 44432</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Write the equation of the line passing through (4, 4) and (4, 2).\r<BR>\n" );
document.write( "\n" );
document.write( "	A)  y = 4    B)  y = –2x    C)  x = 4    D)  y = x + 4<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #29353 by </B><A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><B>tutorcecilia(2152)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><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=tutorcecilia><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=29353\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Slope = m = 4-2/4-4 = 2/0 = undefined slope (cannot divide by zero).<BR>\n" );
document.write( "Since the slope is undefined, the line is vertical and x will be a constant number.  If the line were horizontal, y would be a constant number.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "In both of the given points, (4, 4) and (4, 2), x = 4. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );