So, on number two, the equation given is in slope-intercept form. This just means that the number next to the variable is the rate of change and the number added (or subtracted) is the initial value. So your rate of change would be 1/2, and your initial value is 1. Your first point is (0,1) because your initial value is one. Your second point would be (2,2) because each time the x increases by one, the y increases by 1/2. Each time the x increases by two, the y increases by one. (Basically move two units right and one unit up from the previous point to get a new ordered pair!)
On number three, your initial value is 4. This means that your first point will be (0,4). The rate of change is -3, so your line will be moving downward from left to right. As x increases by one, the y will decrease by three. Your next point would be (1, 1).
