SOLUTION: Determine which two equations represent parallel lines. (a) y = 9x – 9 (b) y = –9x + 9 (c) y = 9x + 4 (d) y = x – 9

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Question 111434: Determine which two equations represent parallel lines.
(a) y = 9x – 9 (b) y = –9x + 9 (c) y = 9x + 4 (d) y = x – 9


Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Since a) and c) have equal slopes of 9, this means these two lines are parallel