Question

PARALLEL AND PERPENDICULAR

would 3 over -5 (3/-5) -5  over -3 (-5/-3) be a perpendicular slope?

Answer 1

`k:y=m_1x+b\\l:y=m_2x+c\\\\k\ ||\ l\ if\ m_1=m_2\\\\k\ \perp\ l\ if\ m_1m_2=-1`

We have:

`m_1=(3)/(-5)=-(3)/(5);\ m_2=(-5)/(-3)=(5)/(3)\\\\m_1m_2=-(3)/(5)\cdot(5)/(3)=-1`
Answer: a perpendicular slope.