Answer:
y =1/3x-2
when two lines are perpendicular to each other (m2= -1/m1)
using the formula y=mx+c
m1=1/3
since m1=1/3, the slope of the other line will be -1/1/3
m2= -3
The slope of the second line passing through the point(0,4) = -3
using the formula
y-y1 =m(x-x1)
y-4= -3(x-0)
y-4= -3(x)
y-4= -3x
y= -3x+4(equation of the line)