Answer:
(1,4) (2,1) (5,1) (4,4)
Step-by-step explanation:
The options are:
(-4,-4) (-4,-1) (-1, -4) (-1,-1)
(-2,-4) (-1, -1) (1,-1) (2, -4)
(1,1) (2,4) (5, 4) ( 4,1)
(1,4) (2,1) (5,1) (4,4)
The only one which has two sides with negative slopes is the last one.
Slope of the side that passes through (1,4) and (2,1): (4 - 1) / (1 - 2) = -3
Slope of the side that passes through (4,4) and (5,1): (4 - 1) / (4 - 5) = -3
