Well, it's hard to really help because I can't draw a graph on here, but what you can do is make a list of a couple numbers (say -3, -2, -1, 0, 1, 2, and 3), and then use them as values of x to find y. Once you have found y, use those two values as your coordinate to plot your line:
x = -3, y = -3 + 4 = 1, so the coordinate would be (-3, 1).
x = -2, y = -2 + 4 = 2, so the coordinate would be (-2, 2).
]Hope that helps! Can you do the rest?