The slope of MN¯¯¯¯¯¯¯ is −3. Which segments are parallel to MN¯¯¯¯¯¯¯?

Select each correct answer.

PQ¯¯¯¯¯, where P is at (5, 6) and Q is at (8, 7)
RS¯¯¯¯¯, where R is at (1, 3) and S is at (4, 2)
WX¯¯¯¯¯¯, where W is at (2, 6) and X is at (4, 0)
TU¯¯¯¯¯, where T is at (8, 1) and U is at (5, 10)