Question 174819
Make a scatter plot of the data below. 
x: -5,-3,-3,0,1,2,5,6
y: -4,12,10,-6,8,0,3,-9 
Describe the correlation of the data. If possible, fit a line to the data and write an equation of the line.
<pre><font size = 4 color = "indigo"><b>
{{{drawing(226.1,400,-6,7,-10,13, grid(1),
circle(-5,-4,.3),
circle(-3,12,.3),
circle(-3,10,.3),
circle(0,-6,.3),
circle(1,8,.3),
circle(2,0,.3),
circle(5,3,.3),
circle(6,-9,.3)  )}}}

The linear correlation is bad, 
because the points don't appear to
fall in a straight line.

The correlation coefficient is
merely -.3839067252 which in
absolute value is not a good
fit, for it isn't close to 1
at all.  The best fitting line,
called the "regression line"
has this equation:

y = -.7624565469x+2.035921205

On the graph that line is:

{{{drawing(226.1,400,-6,7,-10,13, grid(1),
circle(-5,-4,.3),
circle(-3,12,.3),
circle(-3,10,.3),
circle(0,-6,.3),
circle(1,8,.3),
circle(2,0,.3),
circle(5,3,.3),
circle(6,-9,.3), graph(226.1,400,-6,7,-10,13,-.7624565469x+2.035921205))}}}

I found this line on the TI-84.  If you want to know how,
post again.

Edwin</pre>