Question

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

Answer 1

`m= +1/4`

Explanation:

Change to the form of `y = mx + c`

`y = -4x -1`

`m = -4`

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

`m_1 xx m_2 = -1`

The slope perpendicular to `m =-4, " is " m= +1/4`