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?

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