Answer:
your x point is 2
Then, to help you for y=2x just make a table of values
So for y=2(1) y=2, y=2(2) y=4, y= 2(3) y=6
So theres 3 points to start which gives you a hint that each point goes up two times. (0,0) (1,2) (2,4) (3,6)
From the picture attached you can the y intercept is (2,4)