Question

What is the slope of a line perpendicular to the line whose equation is 3x-7y+14=0?

Answer 1

1.  Find the slope of the given line.  Do this by solving 3x-7y+14=0 for m:

3x + 14 = 7y, which gives us m = 3/7.

2.  Find the slope of a line perpendicular to this one.  It's the negative reciprocal of m = 3/7, or -7/3.