I'm on my phone so I can explain number 1, but for the second question just know that anytime you have a line that is x = some number, it will be a vertical line on the x axis at that number. There are two lines on the x axis, not one. There is one at -3 and one a 3. Since its x = 3, not x =-3, you should be able to pick the correct one. ^_^