Question

PQ has a slope of 13. What is the slope of a line perpendicular to PQ?

−1/3

3

1/3

−3

Answer 1

-3

Explanation:

PQ has a slope of 1/3

Perpendicular lines have negative reciprocal slopes

- ( 1 ÷ 1/3)

- ( 3/1)

-3

The slope of a line that is perpendicular is -3