Question

Use slope to determine if lines AB and CD are parallel, perpendicular, or neither 6. A(-3, 8), B(3, 2), C(7,1), D(5,-1)m(AB) m(CD) Types of Lines

Answer 1

`\begin{gathered} \text{Slope for AB }(2-8)/(3-(-3))=(-6)/(6)=-1=m_1 \\ \text{slople for CD }(-1-1)/(5-7)=(-2)/(-2)=1=m_2 \\ m_1\cdot m_2=-1\text{ } \\ \text{they are perpendicular} \end{gathered}`