Answer:
Step-by-step explanation:
Perpendicular lines have negative reciprocal slopes.
Rearrange the known equation to find the slope m
7x - 3y = -9
7x + 9 = 3y
y = (7/3)x + 3
so this line has slope 7/3 and a line perpendicular to it would have slope -3/7
y = (-3/7)x + b
plug in our desired point on the perpendicular line
-8 = (-3/7)(-14) + b
-8 = 6 + b
b = -14
y = (-3/7)x - 14
