Slope

1. C. $-3$.

$\text { Slope }=\frac{\text { Rise }}{\text { Run }}=\frac{\text { Change in } y}{\text { Change in } x}$

$\begin{aligned} \text { Slope } &=\frac{-4-8}{3-(-1)} \\ &=\frac{-12}{4} \\ &=-3 \end{aligned}$

The slope is $-3$.

2. B. $4$

$\text { Slope }=\frac{\text { Rise }}{\text { Run }}=\frac{\text { Change in } y}{\text { Change in } x}$

$\begin{aligned} \text { Slope } &=\frac{9-(-7)}{3-(-1)} \\ &=\frac{16}{4} \\ &=4 \end{aligned}$

The slope is $4$.

3. A. $\frac {1}{2}$

$\text { Slope }=\frac{\text { Rise }}{\text { Run }}=\frac{\text { Change in } y}{\text { Change in } x}$

$\begin{aligned} \text { Slope } &=\frac{9-6}{-3-(-9)} \\ &=\frac{3}{6} \\ &=\frac{1}{2} \end{aligned}$

The slope is $\frac {1}{2}$.

4. B. $- \frac {5}{7}$

$\text { Slope }=\frac{\text { Rise }}{\text { Run }}=\frac{\text { Change in } y}{\text { Change in } x}$

$\begin{aligned} \text { Slope } &=\frac{-3-2}{3-(-4)} \\ &=\frac{-5}{7} \\ &=-\frac{5}{7} \end{aligned}$

The slope is $-\frac {5}{7}$.