document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=445846>Question 445846</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Tomorrow I have a test on slope intercept form, and solving system of equation. For slope intercept form, I know the formula is y=mx+b, and that m is slope and b is y intercept. I just don't understand how to graph it. An example is: Slope= -2, Y intercept= 1. The equation I came up with is Y= -2x+1. What number do I use for x, and how would I graph it.<BR>\n" );
document.write( "For solving system of equations, I don't understand how to graph it either. For example: Y=-x and Y= x+2. How would you be able to put that on a graph.\r<BR>\n" );
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document.write( "I'm really sorry for how long that is, but it's super confusing for me. I had an A in math until this, and now I have a C. I'm hoping if I make a good grade on this test it will bring my grade up before final report cards. Thanks so much :) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #307008 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=307008\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Tomorrow I have a test on slope intercept form, and solving system of equation. For slope intercept form, I know the formula is y=mx+b, and that m is slope and b is y intercept. I just don't understand how to graph it. An example is: Slope= -2, Y intercept= 1. The equation I came up with is Y= -2x+1. What number do I use for x, and how would I graph it.<BR>\n" );
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document.write( "You only need 2 points to determine the graph of a line.<BR>\n" );
document.write( "Using your example: y = -2x+1<BR>\n" );
document.write( "Let x = 0, then y = -2*0+1 = 1 <BR>\n" );
document.write( "That gives you the point (0,1)<BR>\n" );
document.write( "So plot that point.<BR>\n" );
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document.write( "Let x = 2, then y = -2*2+1 = -3<BR>\n" );
document.write( "That gives you the point (2,-3)<BR>\n" );
document.write( "So plot that point.<BR>\n" );
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document.write( "Now draw a line thru those 2 points.<BR>\n" );
document.write( "That is the graph you want.<BR>\n" );
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document.write( "For solving system of equations, I don't understand how to graph it either. For example: Y=-x and Y= x+2. How would you be able to put that on a graph. <BR>\n" );
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document.write( "Graph each line on the same x/y coordinate system.<BR>\n" );
document.write( "If y = -x<BR>\n" );
document.write( "Let x = 0, then y = 0 giving you point (0,0)<BR>\n" );
document.write( "Let x = 2, then y = -2 giving you pont (2,-2)<BR>\n" );
document.write( "Plot those points and draw the line.<BR>\n" );
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document.write( "y = x+2 <BR>\n" );
document.write( "Let x = 0, then y = 2 giving you point (0,2)<BR>\n" );
document.write( "Let x = 3, then y = 5 giving you point (3,5)<BR>\n" );
document.write( "Plot those points and draw the line.<BR>\n" );
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document.write( "To see the solution look for the point that<BR>\n" );
document.write( "is on both of the lines.  That is the solution<BR>\n" );
document.write( "point.<BR>\n" );
document.write( "If the lines are parallel, there is no solution.<BR>\n" );
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document.write( "Hope that helps.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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