document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=251596>Question 251596</A>: <I><SPAN STYLE=\"word-break: break-all;\"> y=1/2x-4 I need 5 solutions for graphing I just do not understand how to do this.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #183283 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=183283\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For graphing you only need two ordered pairs because it is a straight line.<BR>\n" );
document.write( "However your teacher may have told you to plot five points.<BR>\n" );
document.write( "The easiest points to calculate are the intercepts when x=0 and y=0<BR>\n" );
document.write( "So plug in  0 for x and calculate y<BR>\n" );
document.write( "and plug in 0 for y and calculate x<BR>\n" );
document.write( "Just pick any value you want for x and calculate y<BR>\n" );
document.write( "Since you will be multiplying x by 1/2 it would make it easy to choose even numbers for x.\r<BR>\n" );
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document.write( "x=2 brings y=-3\r<BR>\n" );
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document.write( "so now you have three points <BR>\n" );
document.write( "pick an x and calculate y<BR>\n" );
document.write( "pick another  x and calculate y<BR>\n" );
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document.write( " <TR><TD  ALIGN=MIDDLE>Solved by <A  rel=nofollow HREF=http://wiki.algebra.com/index.php/Tutoring_-_pluggable_solvers>pluggable</A> solver: <A  rel=nofollow HREF=describe_linear_equation.solver>DESCRIBE a linear EQUATION: slope, intercepts, etc</A></TD></TR>\n" );
document.write( "<TR><TD  ALIGN=LEFT>Equation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.5+x+%2B+-1+y+=+4 ALIGN=MIDDLE  ALT=\"0.5+x+%2B+-1+y+=+4\"   DISABLED_style= \"max-width:90%; height:auto;\" > describes a sloping line. For any <BR>\n" );
document.write( "  equation ax+by+c = 0, slope is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-a%2Fb+=+-0.5%2F-1 ALIGN=MIDDLE  ALT=\"-a%2Fb+=+-0.5%2F-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<UL><LI>X intercept is found by setting y to 0: ax+by=c becomes ax=c. that means that x =  c/a. 4/0.5 = 8.</LI><LI>Y intercept is found by setting x to 0: the equation becomes by=c, and therefore y = c/b. Y intercept is 4/-1 = -4.</LI><LI>Slope is -0.5/-1 = 0.5.</LI><LI> Equation in slope-intercept form: y=0.5*x+-4.</LI></UL><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28+500%2C+500%2C+8-8%2C+8%2B8%2C+-4-8%2C+-4%2B8%2C+0.5%2Ax%2B-4+%29+ ALIGN=MIDDLE  ALT=\"graph%28+500%2C+500%2C+8-8%2C+8%2B8%2C+-4-8%2C+-4%2B8%2C+0.5%2Ax%2B-4+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\n" );
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