Question

The lines below are perpendicular. If the slope of the green line is 2/3 , what is the slope of the red line?

Answer 1

if the lines are perpendicular then the red line's slope will be the negative reciprocal of the green line's slope. The green lines slope is 2/3. To find the negative reciprocal, you " flip " the slope and change the sign.
since the green line slope is 2/3, then the red lines slope is -3/2. (you see how I flipped the slope and changed the sign).

Answer 2

understand ?

Answer 3

you explained it better than my lesson, thank you so much:)

Answer 4

Now if the lines would have been parallel, their slopes would have been the same