Solve: y=−2xy = -2xy=−2x and y=x+3y = x + 3y=x+3.
(−1,2)(-1, 2)(−1,2)
(1,−2)(1, -2)(1,−2)
(−3,6)(-3, 6)(−3,6)
(0,0)(0, 0)(0,0)