Solve: y=−xy = -xy=−x and y=2x+6y = 2x + 6y=2x+6.
(−2,2)(-2, 2)(−2,2)
(2,−2)(2, -2)(2,−2)
(0,0)(0, 0)(0,0)
(−6,6)(-6, 6)(−6,6)