Answer:
First, third and fifth.
Step-by-step explanation:
Two lines are perpendicular when one's slope is the negative reciprocal of the other's.
The slope of your line is easy to find out: 1/3
Now, a perpendicular line must have a negative reciprocal slope, that is -3.
Of the five lines given as options, only the first one, the third one and the fifth have a slope of -3.
For the record, the slope of the second line is +3 and the slope of the fourth line is +1/3.
