document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=68682>Question 68682</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the equation for the coordinates (1,2) and (2,4) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #48876 by </B><A HREF=/tutors/aboutme.mpl?userid=rmromero><B>rmromero(383)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rmromero><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=48876\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> what is the equation for the coordinates (1,2) and (2,4)\r<BR>\n" );
document.write( "\n" );
document.write( "Two points determine a line. Given you point you can also find the equation of the line.<BR>\n" );
document.write( "<br><BR>\n" );
document.write( "1. Find the slope of the line through two points (1,2) and (2,4).<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%28y%5B2%5D-y%5B1%5D%2Fx%5B2%5D-x%5B1%5D%29 ALIGN=MIDDLE  ALT=\"m+=+%28y%5B2%5D-y%5B1%5D%2Fx%5B2%5D-x%5B1%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <BR>\n" );
document.write( "Let (x1,y1) = (1,2)<BR>\n" );
document.write( "<br>(x2,y2) = (2,4)<BR>\n" );
document.write( "<br><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%284-2%29%2F%282-1%29 ALIGN=MIDDLE  ALT=\"m+=+%284-2%29%2F%282-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+2%2F1 ALIGN=MIDDLE  ALT=\"m+=+2%2F1\"   DISABLED_style= \"max-width:90%; height:auto;\" > or 2\r<BR>\n" );
document.write( "\n" );
document.write( "<br>2.Using slope - intercept form, find y - intercept<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight+%28y+=+mx+%2B+b%29 ALIGN=MIDDLE  ALT=\"highlight+%28y+=+mx+%2B+b%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, Choose one point of the line (1,2) and substitute it to the equation including the slope to find the b or y-intercept.<BR>\n" );
document.write( "m = 2, x = 1 and y = 2<BR>\n" );
document.write( "2 = 2(1) + b<BR>\n" );
document.write( "2 - 2 = b<BR>\n" );
document.write( "0 = b\r<BR>\n" );
document.write( "\n" );
document.write( "<br>so the slope-intercept form of the equation is y = 2x + 0<BR>\n" );
document.write( "or y = 2x\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );