Question

Line m has a slope of 8/5. line n is perpendicular to line m. what is the slope of line n?

Answer 1

$m_{1}m_{2} = - 1$

$\frac{8}{5} \times m_{2} = - 1$

$m_{2} = \frac{5}{8} \times - 1$

$\boxed{ m_{2} = \frac{ - 5}{8} }$