x............y
2............2 + 2 = 4
4............2 + 4 = 6
6............2 + 6 = 8
Since we can't see the graph, I've drawn one for you. See below. Pick the one that looks like this. The y intercept should be 2 so look for a graph that goes through (0,2). The graph you want also goes through (2,0)