document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=204312>Question 204312</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi everyone, I have had some trouble with the following graphing problem.<BR>\n" );
document.write( "If someone could show me how to do it I would be really grateful.<BR>\n" );
document.write( "I need to Find the y-intercept of the straight line passing through points      (-3,1) and (-1,-2). <BR>\n" );
document.write( "I really want to learn how to solve these types of equations, so steps and explanations would be nice.<BR>\n" );
document.write( "Thnaks, -Nick. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #154247 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=154247\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the y-intercept of the straight line passing through points <BR>\n" );
document.write( "(-3,1) and (-1,-2)<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "First you have to find the slope:<BR>\n" );
document.write( "slope = (-2-1)/(-1--3) = -3/2<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "Then you use the form y = mx + b to find b, which is the y-intercept.<BR>\n" );
document.write( "You know y = 1 when x = -3 and you know m = -3/2<BR>\n" );
document.write( "So solve for \"b\":<BR>\n" );
document.write( "1 = (-3/2)-3 + b<BR>\n" );
document.write( "1 = 9/2 + b<BR>\n" );
document.write( "b = -7/2<BR>\n" );
document.write( "The y-intercept is -7/2 or (0,-7/2).<BR>\n" );
document.write( "======================================<BR>\n" );
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document.write( "======================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );