document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1073270>Question 1073270</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have a table with shoe sizes and height in inches (10,70.5), (10.5, 71), (11,72), (9,68.5), (12,74), (8.5,67.5) I need to write an equation for a line.  I figured out that the slope is 2.  How do i write an equation for the line?<BR>\n" );
document.write( "Is it y = mx+b?  <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #688106 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=688106\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> you are correct<BR>\n" );
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document.write( "The linear regression equations are<BR>\n" );
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document.write( "Regression Equation(y) = a + bx<BR>\n" );
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document.write( "Slope(b) = (N&#931;XY - (&#931;X)(&#931;Y)) / (N&#931;X^2 - (&#931;X)^2)<BR>\n" );
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document.write( "Intercept(a) = (&#931;Y - b(&#931;X)) / N <BR>\n" );
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document.write( "Note &#931; means the summation of the variable's values<BR>\n" );
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document.write( "x and y are the variables, x is shoe sizes and y is height in inches<BR>\n" );
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document.write( "b = The slope of the regression line <BR>\n" );
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document.write( "a = The intercept point of the regression line and the y axis. <BR>\n" );
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document.write( "N = Number of values - you have six pairs, so N = 6<BR>\n" );
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document.write( "X = shoe size values <BR>\n" );
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document.write( "Y = height values in inches<BR>\n" );
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document.write( "&#931;XY = Sum of the product of shoe sizes and heights in inches<BR>\n" );
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document.write( "&#931;X = Sum of shoe sizes<BR>\n" );
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document.write( "&#931;Y = Sum of heights in inches<BR>\n" );
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document.write( "&#931;X^2 = Sum of squares of shoe sizes<BR>\n" );
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