Answer
The slopes are not the same, so the points are not collinear.
Work Step by Step
To calculate the slope between points $(x_1,y_1)$ and $(x_2,y_2)$, we use the formula:
$slope=m=\frac{y_2-y_1}{x_2-x_1}$
We calculate the slope between the points $(-1,-3), (-5,12), (1,-11)$ in all three combinations:
$m_1=\frac{12--3}{-5--1}=\frac{15}{-4}$
$m_2=\frac{-11-12}{1--5}=\frac{-23}{6}$
$m_3=\frac{-11--3}{1--1}=\frac{-8}{2}=-4$
The slopes are not the same, so the points are not collinear.
