Question 641473
When dealing with perpendicular, look for a slope that has the negative inverse. In this case, you are look for a pair of points that has a slope of -4/9.
I'm not going to give you the direct answer for this problem, but I will give you a couple of reminders.
First, the equation for slope is the change in y over the change in x. Second, whatever you get your first "y" you must get your first "x" from.