document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=157194>Question 157194</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I dont understand what im supposed to do for this problem:<BR>\n" );
document.write( "without graphing, determine if the graphs of each pair of equations are parallel, perpendicular or neither.\r<BR>\n" );
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document.write( "2y=8x+4 and y=-1/4x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #115853 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=115853\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2y=8x+4 <BR>\n" );
document.write( "y=8x/2+4/2<BR>\n" );
document.write( "y=4x+2 This line has a slope=4. (RED LINE) <BR>\n" );
document.write( "y=-1/4x This line has a slope=-1/4. (GREEN LINE)<BR>\n" );
document.write( "Thus these lines are perpendicular as the slopes are negative recipricals of each other (4 & -1/4).<BR>\n" );
document.write( "Proof:<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+300%2C+300%2C+-6%2C+6%2C+-6%2C+6%2C+4x+%2B2%2C+-x%2F4+%29+ ALIGN=MIDDLE  ALT=\"+graph%28+300%2C+300%2C+-6%2C+6%2C+-6%2C+6%2C+4x+%2B2%2C+-x%2F4+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > (graph 300x300 pixels, x from -6 to 6, y from -6 to 6, of TWO functions 4x +2 and -x/4).  </SPAN>\n" );
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