document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=209958>Question 209958</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0131656422/algebrahomeworkh>Moving straight ahead Linear RelationShips</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Im totaly lost on my 8th grade math homework. It says *For each equations in Exercises 18-21, give two values for x for which the value of y is negative.* <BR>\n" );
document.write( "For 18. y=-2x-5<BR>\n" );
document.write( "19. y= -4 <BR>\n" );
document.write( "20. y=2x-5<BR>\n" );
document.write( "21. y=3/2x-1/4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #158668 by </B><A HREF=/tutors/aboutme.mpl?userid=vleith><B>vleith(2983)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vleith><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=158668\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 18) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-2x-5 ALIGN=MIDDLE  ALT=\"y=-2x-5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "for y to be negative here, any x that is positive will do. Even x=0 would make y negative<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-2%2A0+-+5 ALIGN=MIDDLE  ALT=\"y+=+-2%2A0+-+5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-5 ALIGN=MIDDLE  ALT=\"y+=+-5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "You could solve it algebraically this way. In order for y to be negative, it must be \"less than 0\"<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+%3E+-2x-5 ALIGN=MIDDLE  ALT=\"+0+%3E+-2x-5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5+%3E+-2x ALIGN=MIDDLE  ALT=\"5+%3E+-2x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2.5+%3C+x ALIGN=MIDDLE  ALT=\"-2.5+%3C+x\"   DISABLED_style= \"max-width:90%; height:auto;\" > so any x that is larger than -2.5 will give you a y that is negative. Look at the plot and you can see the same thing<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C400%2C+-10%2C10%2C-10%2C10%2C+-2x-5%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C400%2C+-10%2C10%2C-10%2C10%2C+-2x-5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "19) y= -4 <BR>\n" );
document.write( "This is a horizontal line. So all x, no matter what value has a y = -4\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "20)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y=2x-5 ALIGN=MIDDLE  ALT=\"+y=2x-5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "In this much like 18. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+%3E+2x+-+5 ALIGN=MIDDLE  ALT=\"+0+%3E+2x+-+5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5+%3E+2x ALIGN=MIDDLE  ALT=\"5+%3E+2x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2.5+%3E+x ALIGN=MIDDLE  ALT=\"2.5+%3E+x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Any x less than 2.5 yields a y that is negative<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C400%2C+-10%2C10%2C-10%2C10%2C+2x-5%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C400%2C+-10%2C10%2C-10%2C10%2C+2x-5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "21)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%283%2F2%29x-1%2F4 ALIGN=MIDDLE  ALT=\"y=%283%2F2%29x-1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Same idea here<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+%3E+%283%2F2%29x-1%2F4 ALIGN=MIDDLE  ALT=\"+0+%3E+%283%2F2%29x-1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F4+%3E+%283%2F2%29x ALIGN=MIDDLE  ALT=\"1%2F4+%3E+%283%2F2%29x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F12+%3E+x ALIGN=MIDDLE  ALT=\"2%2F12+%3E+x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F6+%3E+x ALIGN=MIDDLE  ALT=\"1%2F6+%3E+x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Any x less than 1/6 works<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C400%2C+-10%2C10%2C-10%2C10%2C+%283%2F2%29x-1%2F4%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C400%2C+-10%2C10%2C-10%2C10%2C+%283%2F2%29x-1%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );