Answer:
D
Explanation:
the lines are perpendicular if the slopes are negative reciprocals of each other.
If the slope of the first line is -1/3 then the negative reciprocal is 3
y=3x+b
we know that when x=2 y=1 which we can use to solve for b
1=3*2+b
b= -5
thus our final equation is
y=3x-5