SOLUTION: Which is a parallel line to 3x-y=-9? -6x-y=-9 -x+3y=-9 -6x+2y=-9 -6x-2y=-9

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Question 567435: Which is a parallel line to 3x-y=-9?
-6x-y=-9
-x+3y=-9
-6x+2y=-9
-6x-2y=-9
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Compare the slopes of the lines
First, put them all in the form
+y+=+m%2Ax+%2B+b+, where +m+
is the slope
--------------
(1)
+3x+-+y+=+-9+
+y+=+3x+%2B+9+
-------------
(2)
+-6x+-+y+=+-9+
+y+=+-6x+%2B+9+
-------------
(3)
+-x+%2B+3y+=+-9+
+3y+=+x+-+9+
+y+=+%281%2F3%29%2Ax+-+3+
-------------
(4)
+-6x+%2B+2y+=+-9+
+2y+=+6x+-+9+
+y+=+3x+-+9%2F2+
-------------
(5)
+-6x+-+2y+=+-9+
+2y+=+-6x+%2B+9+
+y+=+-3x+%2B+9%2F2+
-------------
The slope that matches the slope of
equation (1) is equation (4):
(1) +y+=+3x+%2B+9+
(4) +y+=+3x+-+9%2F2+
+m+=+3+ for both