slope of 9,3 19,-17
\(\begin{array}{rcll} \text{slope } &=& \frac{ \Delta y } { \Delta x } \\ &=& \frac{-17-3}{19-9} \\ &=& \frac{-20}{10} \\ \mathbf{ \text{slope } } &\mathbf{=}& \mathbf{-2} \\ \end{array}\)
