If graphed, which of the following pairs of equations would be parallel to each other?

If graphed, which of the following pairs of equations would be parallel to each other?
A . y = 2x + 4, y = x + 4
B . y = 3x + 3, y = C1/3x C 3
C . y = 4x + 1, y = 1/5x + 5
D . y = 5x + 5, y = 1/5x + 5
E . y = 6x + 6, y = 6x C 4

Answer: E

Explanation:

Parallel lines have the same slope. The lines y = 6x + 6 and y = 6x C 6 both have a slope of 6, so they are parallel to each other.

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