Question 572128
The equation for the perpendicular line given that (6, -5) and 9x +8y=7. 
Here is what I have done so far for the parallel line that I had to figure:
y=-9/8x+7/8
slope is -9/8 
----------
Slope of a line perpendicular to the given line must be (8/9)
-----
Form: y = mx + b where m = 8/9 and y = -5 when x = 6
------------------------------------------------
-5 = (8/9)6 + b
-45/9 = 48/9 + b
b = -93/9 = -31/3
-----
Equation:
y = (8/9)x -(31/3)
======================
Cheers,
Stan H.