Answer
All points are on the same line.
Work Step by Step
Slope between $(2,1)$ and $(0,0)$.
$\frac{0-1}{0-2}=\frac{-1}{-2}=\frac{1}{2}$
Slope between $(0,0)$ and $(-2,-1)$.
$\frac{-1-0}{-2-0}=\frac{-1}{-2}=\frac{1}{2}$
Slope between $(-2,-1)$ and $(-4,-2)$.
$\frac{-2-(-1)}{-4-(-2)}=\frac{-1}{-2}=\frac{1}{2}$
All slopes are the same, so all points are on the same line.
