Answer:
D: y = -x/3 + 2
Explanation:
The key word here is "perpendicular." If the given line has slope 3, the slope of any line perpendicular to this one is the NEGATIVE RECIPROCAL of 3:
m = -1/3.
This narrows down our answer choice to D: y = -x/3 + 2, same as y = (-1/3) + 2. The slopes of all other answer choices given here are incorrect.