document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=763735>Question 763735</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I've been trying to figure this out....i'm confused!  \r<BR>\n" );
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document.write( "Find an equation of the line. Write the equation in slope-intercept form. Through (2,7) perpendicular to x=9  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #464973 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=464973\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you have a line with slope = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+m+ ALIGN=MIDDLE  ALT=\"+m+\"   DISABLED_style= \"max-width:90%; height:auto;\" >, then ANY<BR>\n" );
document.write( "line perpendicular to it has slope = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-1%2Fm+ ALIGN=MIDDLE  ALT=\"+-1%2Fm+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "The line <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x=9+ ALIGN=MIDDLE  ALT=\"+x=9+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is saying: \" I don't care what the<BR>\n" );
document.write( "value of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+ ALIGN=MIDDLE  ALT=\"+y+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is, if I look at the x-axis, I will see <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+9+ ALIGN=MIDDLE  ALT=\"+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" > \"<BR>\n" );
document.write( "This is a vertical line through ( 9,y ) where <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+ ALIGN=MIDDLE  ALT=\"+y+\"   DISABLED_style= \"max-width:90%; height:auto;\" > can be<BR>\n" );
document.write( "anything.<BR>\n" );
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document.write( "A line perpendicular to a vertical line is a horizontal line.<BR>\n" );
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document.write( "So, you have a horizontal line through ( 2,7 )<BR>\n" );
document.write( "All horizontal line have slope = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+ ALIGN=MIDDLE  ALT=\"+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Using the general point-slope formula:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+y+-+7+%29+%2F+%28+x+-+2+%29+=+0+ ALIGN=MIDDLE  ALT=\"+%28+y+-+7+%29+%2F+%28+x+-+2+%29+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+-+7+=+0%2A%28+x+-+2+%29+ ALIGN=MIDDLE  ALT=\"+y+-+7+=+0%2A%28+x+-+2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+7+ ALIGN=MIDDLE  ALT=\"+y+=+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "If you want it in slope-intercept form, it's<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+0%2Ax+%2B+7+ ALIGN=MIDDLE  ALT=\"+y+=+0%2Ax+%2B+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "This line is saying: \" I don't care what <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+ ALIGN=MIDDLE  ALT=\"+x+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is, when I<BR>\n" );
document.write( "look at the y-axis, I always see <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+7+ ALIGN=MIDDLE  ALT=\"+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" >. This just<BR>\n" );
document.write( "says it's a horizontal line.\r<BR>\n" );
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