To know which graph is it, we have to calculate the straight-line equation, preferably with the form:

where m is the slope and b is the y-intercept.
As we have the inequality:

We have to isolate y:
0. Adding 9 to both sides of the equation.


2. Dividing both sides of the equation against 3:


Then, we have the y-intercept which is (0, 3). Additionally, with the inequality sign, we can see that it includes all the y values below or equal that equation, meaning that a continuous line will be placed (instead of a discontinuous).
Answer: A.