Answer:
Graph C.
Step-by-step explanation:
First draw the line as if there is no greater than or less than. Ie., plot y = 3x. Then you can see that answers B and D have a different line so they cannot possibly be right.
Now all we have to figure out is if we have to be above or below y = 3x. The equation says that y has to be smaller than 3x. So for any given x, e.g. x=1, we want to have a smaller y, thus smaller than the 3 that is on the line.
We have to be below the line, so answer C is the right one.