SOLUTION: Which two lines are parallel? A. 5y = �3x � 5 B. 5y = �5 � 3x C. 3y � 2x = �1 Is the line through points P(�7, 2) and Q(7, �6) parallel to the line through points R

Question 551115: Which two lines are parallel?
A. 5y = �3x � 5
B. 5y = �5 � 3x
C. 3y � 2x = �1
Is the line through points P(�7, 2) and Q(7, �6) parallel to the line through points R(�1, �5) and S(�3, �1)? Explain.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Which two lines are parallel?
A. 5y = �3x � 5
B. 5y = �5 � 3x
C. 3y � 2x = �1
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A & B are the same equation. Not parallel, but coincident.
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Is the line through points P(�7,2) and Q(7,�6) parallel to the line through points R(�1,�5) and S(�3,�1)? Explain.
------------
Find the slope of each pair.
Slope, m = diffy/diffx
For P & Q, = (2 - (-6))/(-7 - 7) = 8/-14
m = -4/7
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Find the slope for R & S.
If the slope is the same, they're parallel.
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