+ y = 12/7 –(3/7)x + y = 4 –x (2/7)x + y = -2 -2x + y = 1 Horizontal Vertical Neither 7x + y = 0 Vertical Horizontal Vertical Horizontal Neither Horizontal Vertical ¼ -30 -2x + y = 2 Undefined -3/4 -1/2 6 5/4 1/9 3 0 -1/5 -1 3/2 4x + y = 6 0 -3 -1 Undefined
–x + y = 4 (2/7)x + y = -2 7x + y = 0 -2x + y = 2 4x + y = 6 –(3/7)x + y = 12/7 -2x + y = 1 Horizontal Vertical Neither Vertical Horizontal Vertical Horizontal Neither Horizontal Vertical ¼ -30 Undefined -3/4 -1/2 6 5/4 1/9 3 0 -1/5 -1 3/2 0 -3 -1 Undefined