SOLUTION: 22. Determine which two equations represent parallel lines. (a) y = –9x + 4 (b) y = 9x + 4 (c) y = 1/9x + 4 (d) y = –9x + 5

Algebra ->  Algebra  -> Graphs -> SOLUTION: 22. Determine which two equations represent parallel lines. (a) y = –9x + 4 (b) y = 9x + 4 (c) y = 1/9x + 4 (d) y = –9x + 5       Log On

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Question 27183: 22. Determine which two equations represent parallel lines.
(a) y = –9x + 4 (b) y = 9x + 4 (c) y = 1/9x + 4
(d) y = –9x + 5

Answer by rodriguezh2(15) About Me  (Show Source):
You can put this solution on YOUR website!
Parallel lines have the same slope. When a line is given in y = mx + b format then m = slope.
We can then say that (a) y = -9x + 4 and (d) y = -9x + 5 are parallel
They have the same slope, -9