Answer:
m = -3/4
Explanation:
Going from (6, 3) to (9, 7), x (the run) increases by 3 and y (the rise) increases by 4. Thus, the slope of the line connecting these two points is m = rise/run = 4/3.
Two lines are perpendicular if their slopes are negative reciprocals of one another. In this case, the slope of q is the negative reciprocal of 4/3, and is
m = -3/4.