Question

What is the slope of (1, -19) and (-2, -7)?

Answer 1

Slope of two points is $\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$. Plugging in your values, order does not matter, gives you $\frac{-7-(-19)}{-2-1}=\frac{12}{-3}=-4$, meaning your slope is -4.