Answer:
To know if these lines are parallel, you have to look at the slopes. If the slopes are the same, the lines are parallel. In this case, they are not.
Explanation:
The slope is the number in front of your x. So for the first line it is -3 and for the second one it's 9. These numbers indicate the direction of the line, so if they are equal, the lines are parallel. In this case, the slopes are not the same, so the lines are not parallel.