Answer:
y = -6/7x - 3/7 or 7y = -6x - 3
Explanation:
I'm guessing you mean line c: y = -6/7x - 1
Parallel lines have same slope => line d will have slope = -6/7
y = mx + b
-9 = -6/7(10) + b
-9 = -60/7 + b
b = 60/7 - 9 = 60/7 - 63/7 = -3/7
y = -6/7x - 3/7
or 7y = -6x - 3