Answer:
The answer to your question is below
Explanation:
Part A.
-3x + 7y = 13
Solve the equation for "y"
7y = 3x + 13
y =

Part B.
Two lines are parallel if their slopes are the same
Two lines are perpendicular if their slope are opposite reciprocals
Slope of the first line =

Slope of the second line =

Conclusion: the lines are parallel because their slopes are the same.