Question

A line has a slope of -6 over 7. What is the slope of the line parallel to it? And what is the slope of the line perpendicular to it?

Answer 1

the slope of the parallel line is -6/7
the slope of the perpendicular line is 7/6
the slope of the line = -6/7
the gradient of two parallel lines are equal
the product of the gradient of two perpendicular lines is -1
: the gradient m1*m2 = -1
m2= -1(-6/7)
m2= 7/6