document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=742372>Question 742372</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi there,<BR>\n" );
document.write( "I am having trouble with finding an equation for two sets of coordinates.<BR>\n" );
document.write( "for example, the question is<BR>\n" );
document.write( "find the equation for the coordinates (0,-3) (2,3) <BR>\n" );
document.write( "I know y=mx+c and I know how to find m and c but I don't understand some things.<BR>\n" );
document.write( "would they have the same equation or not? because for x1 y1 the equation would be<BR>\n" );
document.write( "y=3x-3 right? But I don't think it is right for the whole of the coordinates because shouldn't there only be one equation for the co-ordinate (0,-3) (2,3)?<BR>\n" );
document.write( "Help or if you cant understand me point me in the direction of a page to help :)<BR>\n" );
document.write( "Thanks <BR>\n" );
document.write( "Sariah<BR>\n" );
document.write( "p.s this site is amazing :) helped out a lot. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #452424 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=452424\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> find the equation for the coordinates (0,-3) (2,3) <BR>\n" );
document.write( "I think you are referring to the equation of a line, y=mx+b, m=slope, b=y-intercept<BR>\n" );
document.write( "slope can be found when you have 2 points on the line which you have.<BR>\n" );
document.write( "slope=&#8710;y/&#8710;x=(y1-y2)/(x1-x2)=(3-(-3))/(2-0)=6/2=3<BR>\n" );
document.write( "equation: y=3x+b<BR>\n" );
document.write( "solve for b, using any one of the given points(2,3)<BR>\n" );
document.write( "3=3*2+b<BR>\n" );
document.write( "b=-3<BR>\n" );
document.write( "equation of the line given coordinates are on: y=3x-3<BR>\n" );
document.write( "You got the correct answer and hopefully you now have a better understanding of the problem. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );