SOLUTION: Determine which two equations represent parallel lines. (a) y = x + 4 (b) y = x – 7 (c) y = 2x + 8 (d) y = 2x – 4 Thanks.

Algebra ->  Algebra  -> Linear-equations -> SOLUTION: Determine which two equations represent parallel lines. (a) y = x + 4 (b) y = x – 7 (c) y = 2x + 8 (d) y = 2x – 4 Thanks.      Log On

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Question 70046: Determine which two equations represent parallel lines.
(a) y = x + 4
(b) y = x – 7
(c) y = 2x + 8 (d) y = 2x – 4
Thanks.
Answer by rapaljer(3742) About Me  (Show Source):
You can put this solution on YOUR website!
Lines (a) and (b) are parallel, since the coefficients of x are both the same. Slope = 1.

Also, lines (c) and (d) are also parallel, since their coefficients and therefore slopes are the same. Slope = 2.

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