Question

The lines shown below are perpendicular. If the green line has a slope of -1/4, what is the slope of the red line

Answer 1

+4

Explanation:

The slopes of perpendicular lines are negative reciprocals of one another.

Here, with one slope being -1/4, the slope of a perpendicular line would be +4.

Answer 2

4

Explanation:

The slope of the green line is the negative reciprocal of that of the red line:

-1 / (-1/4), or just 4