How do you find the slope of the line through (-4,-1) and (1,-2)?

Ans: $- \frac{1}{5}$
slope formula: $a = \frac{y 2 - y 1}{x 2 - x 1}$
$a = \frac{- 2 - \left(- 1\right)}{1 - \left(- 4\right)} = - \frac{1}{5}$