document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=333725>Question 333725</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let C = Celsius degree and F= Fahrenheit degree scales for temperature. Assuming that relation between C and F is linear and drawing F on vertical axis. Two data points on the line relating C and F are (5, 41), (25, 77) Find the equation relating C and F. Can it be applied for practical purposes? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #239145 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=239145\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (5, 41), (25, 77)<BR>\n" );
document.write( "the slope of the line passing through the above points =<BR>\n" );
document.write( "77-41 / 25-5<BR>\n" );
document.write( "=36/20<BR>\n" );
document.write( "=9/5 = m the slope<BR>\n" );
document.write( "..<BR>\n" );
document.write( "general equation of line = y = mx +b<BR>\n" );
document.write( "plug value of any point and the slope m in the equation<BR>\n" );
document.write( "(5,41)<BR>\n" );
document.write( "41=9/5 *5 +b<BR>\n" );
document.write( "41=9+b<BR>\n" );
document.write( "41-9=b<BR>\n" );
document.write( "b=32<BR>\n" );
document.write( "..<BR>\n" );
document.write( "so the general equation will be <BR>\n" );
document.write( "y = 9/5 x + 32<BR>\n" );
document.write( "f is drawn on they axis and c on the x axis<BR>\n" );
document.write( "f= 9/5 c + 32<BR>\n" );
document.write( "..<BR>\n" );
document.write( "Plot the points and join the points to get a graph as given below.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C200%2C-30%2C80%2C-30%2C80%2C%289x%2F5%29%2B32%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C200%2C-30%2C80%2C-30%2C80%2C%289x%2F5%29%2B32%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );