document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1025727>Question 1025727</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find a formula for the linear function whose graph intercepts the x-axis at x=80 and the y-axis at y= -90 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #641025 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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/cgi-bin/show-face.mpl?user=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=641025\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi there,<BR>\n" );
document.write( "Using the co-ordinates (80,0)<BR>\n" );
document.write( "and (0, -90)<BR>\n" );
document.write( "Gradient = y2 - y1/x2 - x1<BR>\n" );
document.write( "Gradient = 0 -(-90)/80 - 0<BR>\n" );
document.write( "Gradient = 90/80 = 9/8<BR>\n" );
document.write( "m = 9/8<BR>\n" );
document.write( "Intercept with y axis = (0,-90)<BR>\n" );
document.write( "therefore c = -90<BR>\n" );
document.write( "y = mx + c<BR>\n" );
document.write( "y = 9/8x - 90<BR>\n" );
document.write( "Hope this helps :-) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );