Answer
$\hat y = -0.7136x + 6.5498$
Work Step by Step
$b{_1} = r. \frac{s_{y}}{s_{x}}$
$= -0.9477. \frac{1.8239}{2.4221} = -0.7136$
$b_{o} = \bar y - b_{1}\bar x$
$= 3.9333 - (-0.7136) 3.6667 = 6.5498$
Equation of regression line is:
$\hat y = b_{1}x + b_{o}$
$\hat y = -0.7136x + 6.5498$
