Parallel and Perpendicular Lines (Leaving Cert Mathematics): Quizzes

They have the same slope

90°

$m_1 = m_2$

-1

$-\frac{a}{b}$

$-\frac{4}{3}$

2 and $-\frac{1}{2}$

First and second

$y - y_1 = m(x - x_1)$

5

Yes, product is -1

$-\frac{1}{2}$