Question

Here are the equations of four lines.

Two of the lines are parallel.
Which lines?
Line 1 2y = 8x + 6
Line 2 x + y = 6
Line 3 4x - y = 5
Line 4 4x + 2y = 1

Answer 1

Line 1 2y = 8x + 6 y = 8/2 x + 6 = 4 x + 6 slope = 4

Line 3 4x - y = 5 y = 4 x -5 slope = 4

Explanation:

y = mx + b m: slope

Line 1 2y = 8x + 6 y = 8/2 x + 6 = 4 x + 6 slope = 4

Line 3 4x - y = 5 y = 4 x -5 slope = 4

parallel lines have same slope