document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=82377>Question 82377</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the slope of the line containing the given points:\r<BR>\n" );
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document.write( "(z + q,z) and (z - q,z)\r<BR>\n" );
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document.write( "note: i know the formula of slope, m, is Y - Y1/X - X1.  This is what i was thinking, please let me know where i'm going wrong.  i have the solutions manual, but its not making sense.  i don't know if x and x1 are both equal to z, or if you have to somehow factor z +/- q,z in both problems to get the solution.  the manual has the first step typed out as: z-z/2-q-(z+q), and then of course 0/2q.  however, i don't understand how the first step to the solution was solved.  thank you.  Joanna<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 #59031 by </B><A HREF=/tutors/aboutme.mpl?userid=303795><B>303795(602)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=303795><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=59031\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If the first point is labelled as (X,Y) and the second point is labelled as (X1,Y1)<BR>\n" );
document.write( "Then for the first point X = z + q and Y = z<BR>\n" );
document.write( "For the second point X1 = z - q and Y1 = z<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%28Y+-+Y1%29%2F%28X+-+X1%29 ALIGN=MIDDLE  ALT=\"m+=+%28Y+-+Y1%29%2F%28X+-+X1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Substitute the X, Y, X1 and Y1 values into the gradient equation.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%28z+-+z%29%2F%28%28z+%2B+q%29+-+%28z+-+q%29%29 ALIGN=MIDDLE  ALT=\"m+=+%28z+-+z%29%2F%28%28z+%2B+q%29+-+%28z+-+q%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Take (z - q) changes the signs to (-z + q)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%280%29%2F%28z+%2B+q+-+z+%2B+q%29 ALIGN=MIDDLE  ALT=\"m+=+%280%29%2F%28z+%2B+q+-+z+%2B+q%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%280%29%2F%282q%29 ALIGN=MIDDLE  ALT=\"m+=+%280%29%2F%282q%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "ie the slope is zero. The line is parallel to the x axis.<BR>\n" );
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