How do you find the slope that is perpendicular to the line 4x + y = -1?

Sep 2, 2016

$m = + \frac{1}{4}$

Explanation:

Change to the form of $y = m x + c$

$y = - 4 x - 1$

$m = - 4$

If lines are perpendicular, then the slopes are negatives reciprocals of each other.

${m}_{1} \times {m}_{2} = - 1$

The slope perpendicular to $m = - 4 , \text{ is } m = + \frac{1}{4}$