Learning task 2. without graphing, tell whether the graphs of the system of equations are parallel, perpendicular, intersecting or coinciding. do it in your notebook. 1.y = x 7 and y = - x 2 3. 2x y = 1 and 2y 4x = 2 2.y = 5x and y = 5x - 1 4. y = 2x 3 and y = -x - 4