Question

what is the slope of (-2-1) and (1.-3)

Answer 1

For this we use the slope formula, where m is the slope:

$m=\frac{y_2-y_1}{x_2-x_1}$

If we take (-2, -1) as the first point and (1, -3) as the second point, we have:

$m=\frac{-3-(-1)}{1-(-2)}=\frac{-3+1}{1+2}=-\frac{2}{3}$