Question
State whether the two lines in the following are parallel, perpendicular or neither. Through (3, 15) and (16, 6); through (-5, 3) and (8, 2)

Answer

Slope of line joining (3, 15) and (16, 6) $\text{m}_1=\frac{6-5}{16-3}=\frac{-9}{13}$ Slope of the line joining (-5, 3) and (8, 2)f$\text{m}_2=\frac{2-3}{8-(-5)}=\frac{-1}{13}$
Here, neither $m_1 = m_2$ nor $m_1 \times m_2 = -1 \therefore$ The lines are neither parallel nor perpendicular.

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