It can be on number line since there is only one variable. Just because the variable is x does not mean we should use number plane.
But again, you're right, it does depend.
What subject are you on? @Ben103
I think you should use number plane. Algebra 2 usually focuses on inequality, which usually have two variables. |dw:1358041581217:dw|
Does this help you? Need any more examples?
For number line, use open circle, for plane, use dashed line. ">" only mean greater than, so it does not include the number itself. Yes it goes right. Is it clear?
I just use dot so you know it's -13/2. Just use dashed line.
If you use number line, then no, it's not closed circle, it's opened.
Which one do you use?
In graphs, all you have to put are important features. you don't need to write a 4 or a 5. Just write -13/4. Unrelevant features does not give you extra marks.