Chapter 2 Linear Equations and Functions - 2.3 Graph Equations of Lines - 2.3 Exercises - Quiz for Lessons 2.1-2.3 - Page 96: 4

neither

By using the slope formula, the slopes of the lines are: $m_1=\frac{y_2-y_1}{x_2-x_1}=\frac{-7-9}{-3-1}=\frac{-16}{-4}=4.$ $m_2=\frac{y_2-y_1}{x_2-x_1}=\frac{-4-(-2)}{-1-0}=\frac{-2}{-1}=2.$ Since $m_1m_2\ne-1$ and $m_1\ne m_2$, they are neither.