Which of the following pairs of equations represents parallel lines?

A. y = 2x + 3 and y = 2x - 5

B. y = -x + 1 and y = x + 1

C. 3x + 2y = 6 and 3x + 2y = 12

D. x + 2y = 4 and 2x + 4y = 8

E. None of the above

Answer: A. y = 2x + 3 and y = 2x - 5

Parallel lines have the same slope. Both equations in option a have a slope of 2, indicating they are parallel.

Posted in: Linear Equations - Algebra - Mathematics