document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=770822>Question 770822</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the coefficient of correlation if given r^2 = 0.89 for a scatter plot with a linear equation (grade = -0.1106 class size + 76.3)?\r<BR>\n" );
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document.write( "I am not sure if I am correct, but is the answer 0.94? If it is not correct, please show the work to get an alternate answer.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #469786 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><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=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=469786\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since r^2 = 0.89\r<BR>\n" );
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document.write( "The coefficient of correlation is:  -sqrt(0.89) = 0.943  or sqrt(0.89)= -0.943\r<BR>\n" );
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document.write( "(rounded to 3 dp)  but since the slope of the line is < 0\r<BR>\n" );
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document.write( "The answer is :  r = -0.943\r<BR>\n" );
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document.write( "You can ask me more at: mthman@gmail.com\r<BR>\n" );
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document.write( "Thanks </SPAN>\n" );
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