document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=112171>Question 112171</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Graph:<BR>\n" );
document.write( "y=4/5x-7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #81839 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=81839\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <TABLE  BORDER=1>\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=graphing_linear_equations.solver>Graphing Linear Equations</A></TD></TR>\n" );
document.write( "<TR><TD  ALIGN=LEFT>In order to graph <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%284%2F5%29%2Ax-7 ALIGN=MIDDLE  ALT=\"y=%284%2F5%29%2Ax-7\"   DISABLED_style= \"max-width:90%; height:auto;\" > we only need to plug in two points to draw the line<BR>\n" );
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document.write( "  So lets plug in some points<BR>\n" );
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document.write( "  Plug in x=0<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%284%2F5%29%2A%280%29-7 ALIGN=MIDDLE  ALT=\"y=%284%2F5%29%2A%280%29-7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  <BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=0%2F5-7 ALIGN=MIDDLE  ALT=\"y=0%2F5-7\"   DISABLED_style= \"max-width:90%; height:auto;\" > Multiply<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-35%2F5 ALIGN=MIDDLE  ALT=\"y=-35%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > Add<BR>\n" );
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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;\" > Reduce<BR>\n" );
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document.write( "  So here's one point (0,-7)<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28+600%2C+600%2C+-10%2C15%2C+-17%2C+7%2C%0D%0A++++grid%28+1+%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+.15%2C+1.5+%29%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+.1%2C+1.5+%29+%29%0D%0A++%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "  Now lets find another point <BR>\n" );
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document.write( "  Plug in x=5<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%284%2F5%29%2A%285%29-7 ALIGN=MIDDLE  ALT=\"y=%284%2F5%29%2A%285%29-7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  <BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=20%2F5-7 ALIGN=MIDDLE  ALT=\"y=20%2F5-7\"   DISABLED_style= \"max-width:90%; height:auto;\" > Multiply<BR>\n" );
document.write( "  <BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-15%2F5 ALIGN=MIDDLE  ALT=\"y=-15%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > Add<BR>\n" );
document.write( "  <BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-3 ALIGN=MIDDLE  ALT=\"y=-3\"   DISABLED_style= \"max-width:90%; height:auto;\" > Reduce<BR>\n" );
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document.write( "  So here's another point (5,-3). Add this to our graph<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28+600%2C+600%2C+-10%2C15%2C+-17%2C+7%2C%0D%0A++++grid%28+1+%29%2C%0D%0A++++blue%28+circle%28+5%2C-3%2C+.15%2C+1.5+%29%29%2C%0D%0A++++blue%28+circle%28+5%2C-3%2C+.1%2C+1.5+%29+%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+.15%2C+1.5+%29%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+.1%2C+1.5+%29+%29%0D%0A++%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "  Now draw a line through these points<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28+600%2C+600%2C+-10%2C15%2C+-17%2C+7%2C%0D%0A++++grid%28+1+%29%2C%0D%0A++++line%28-10-10%2C0.8%2A%28-10-10%29%2B-7%2C15%2B10%2C0.8%2A%2815%2B10%29%2B-7%29%2C%0D%0A++++blue%28+circle%28+5%2C-3%2C+.15%2C+1.5+%29%29%2C%0D%0A++++blue%28+circle%28+5%2C-3%2C+.1%2C+1.5+%29+%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+.15%2C+1.5+%29%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+.1%2C+1.5+%29+%29%0D%0A++%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > So this is the graph of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%284%2F5%29%2Ax-7 ALIGN=MIDDLE  ALT=\"y=%284%2F5%29%2Ax-7\"   DISABLED_style= \"max-width:90%; height:auto;\" > through the points (0,-7) and (5,-3)<BR>\n" );
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document.write( "  So from the graph we can see that the slope is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2F5 ALIGN=MIDDLE  ALT=\"4%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > (which tells us that in order to go from point to point we have to start at one point and go  up 4 units and to the right 5 units to get to the next point) the y-intercept is (0,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-7 ALIGN=MIDDLE  ALT=\"-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >)and the x-intercept is (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8.75 ALIGN=MIDDLE  ALT=\"8.75\"   DISABLED_style= \"max-width:90%; height:auto;\" >,0)  ,or (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=35%2F4 ALIGN=MIDDLE  ALT=\"35%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" >,0) <BR>\n" );
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document.write( "  We could graph this equation another way. Since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b=-7 ALIGN=MIDDLE  ALT=\"b=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" > this tells us that the y-intercept (the point where the graph intersects with the y-axis) is (0,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-7 ALIGN=MIDDLE  ALT=\"-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >). <BR>\n" );
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document.write( "  So we have one point (0,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-7 ALIGN=MIDDLE  ALT=\"-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >)<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28+600%2C+600%2C+-10%2C15%2C+-17%2C+7%2C%0D%0A++++grid%28+1+%29%2C%0D%0A++%0D%0A++++blue%28+circle%28+0%2C-7%2C+0.166666666666667%29%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+0.166666666666667-0.05%29+%29%0D%0A++%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "  Now since the slope is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2F5 ALIGN=MIDDLE  ALT=\"4%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" >, this means that in order to go from point to point we can use the slope to do so. So starting at (0,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-7 ALIGN=MIDDLE  ALT=\"-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >), we can go up 4 units <BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28++600%2C+600%2C+-10%2C15%2C+-17%2C+7%2C%0D%0A++++grid%281%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+0.166666666666667%29%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+0.166666666666667-0.05%29+%29%0D%0A++blue%28+arc%28+0%2C+-7%2B%284%2F2%29%2C+2%2C+4%2C+90%2C+270+%29+%29%0D%0A++%0D%0A++%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  and to the right 5 units to get to our next point<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28++600%2C+600%2C+-10%2C15%2C+-17%2C+7%2C%0D%0A++++grid%281%29%2C%0D%0A++++blue%28+circle%28+5%2C-3%2C+0.166666666666667%29%29%2C%0D%0A++++blue%28+circle%28+5%2C-3%2C+0.166666666666667-0.05+%29+%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+0.166666666666667%29%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+0.166666666666667-0.05%29+%29%2C%0D%0A++blue%28+arc%28+0%2C+-7%2B%284%2F2%29%2C+2%2C+4%2C+90%2C+270+%29+%29%2C%0D%0A++blue%28+arc%28+%285%2F2%29%2C+-3%2C+5%2C+2%2C+180%2C+360+%29+%29%0D%0A++%0D%0A++%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  Now draw a line through those points to graph <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%284%2F5%29%2Ax-7 ALIGN=MIDDLE  ALT=\"y=%284%2F5%29%2Ax-7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  <BR>\n" );
document.write( "  <BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28+600%2C+600%2C+-10%2C15%2C+-17%2C+7%2C%0D%0A++++grid%28+1+%29%2C%0D%0A++++line%28-10-10%2C0.8%2A%28-10-10%29%2B-7%2C15%2B10%2C0.8%2A%2815%2B10%29%2B-7%29%2C%0D%0A++++blue%28+circle%28+5%2C-3%2C+0.166666666666667%29%29%2C%0D%0A++++blue%28+circle%28+5%2C-3%2C+0.166666666666667-0.05+%29+%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+0.166666666666667%29%29%2C%0D%0A++++blue%28+circle%28+0%2C-7%2C+0.166666666666667-0.05%29+%29%2C%0D%0A++blue%28+arc%28+0%2C+-7%2B%284%2F2%29%2C+2%2C+4%2C+90%2C+270+%29+%29%2C%0D%0A++blue%28+arc%28+%285%2F2%29%2C+-3%2C+5%2C+2%2C+180%2C+360+%29+%29%0D%0A++%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > So this is the graph of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%284%2F5%29%2Ax-7 ALIGN=MIDDLE  ALT=\"y=%284%2F5%29%2Ax-7\"   DISABLED_style= \"max-width:90%; height:auto;\" > through the points (0,-7) and (5,-3)<BR>\n" );
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document.write( " </SPAN>\n" );
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