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