document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=866791>Question 866791</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A company analyses its sales for 5 consecutive years from 2006- 2010.  The results are shown in the table below.\r<BR>\n" );
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document.write( "year            sales (millions of rands)<BR>\n" );
document.write( "2006            20<BR>\n" );
document.write( "2007            25<BR>\n" );
document.write( "2008            28<BR>\n" );
document.write( "2009            22<BR>\n" );
document.write( "2010            30\r<BR>\n" );
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document.write( "a) Calculate the Pearson's correlation coefficient. (Hint: Use 1, 2, 3, 4 and 5 as the independent variables corresponding to 2006, 2007, 2008, 2009 and 2010 respectively).<BR>\n" );
document.write( "b) Determine the linear regression equation and use it to predict the sales in 2011. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #522494 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=522494\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "using Excel scatter graph<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/display-illustration.mpl?tutor=ewatrrr&illustration_name=scatter\">. </SPAN>\n" );
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