Question

What is the slope of a line that is perpendicular to C(13, 2), D(15, -5)?

Answer 1

Any line perpendicular to C(13,2), D(15,-5) has a slope of `2/7`

Explanation:

The line segment joining C(13,2), D(15,-5)
has a slope of `(Delta y)/(Delta x) = (2-(-5))/(13-15) = -7/2`

If a line has a slope of `m` any line perpendicular to it has a slope of `(-1/m)`