Question 359724
{{{drawing(300,300,-30,70,-10,90,
grid(1),
circle(34,59,1.3),
circle(39,69,1.3),
circle(30,50,1.3),
circle(33,56,1.3),
circle(36,64,1.3),
circle(38,66,1.3),
circle(45,77,1.3),
circle(41,73,1.3),
circle(48,83,1.3),
graph(300,300,-30,70,-10,90,0))}}}

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{{{x[ave]=38.22}}}
{{{y[ave]=66.33}}}
{{{SSXX=267.56}}}
{{{SSYY=876}}}
{{{SSXY=480.33}}}
{{{b1=SSXY/SSXX=1.795}}}
{{{b2=SSXY/SSYY=0.548}}}
{{{r^2=b1*b2=0.984}}}
{{{r=0.992}}}
{{{a=y[ave]-b1*x[ave]=-2.286}}}
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{{{highlight_green(y=-2.286+1.795x)}}}
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{{{drawing(300,300,-30,70,-10,90,
grid(1),
circle(34,59,1.3),
circle(39,69,1.3),
circle(30,50,1.3),
circle(33,56,1.3),
circle(36,64,1.3),
circle(38,66,1.3),
circle(45,77,1.3),
circle(41,73,1.3),
circle(48,83,1.3),
graph(300,300,-30,70,-10,90,0,-2.286+1.795x))}}}