Answer:
y = -x/3 + 1/3
Step-by-step explanation:
If a line is perpendicular to another line, then the gradient would be the negative reciprocal of the equation.
The line perpendicular to y = 3x + 5 would be y = -x/3 + c
To find c, you sub in the given point (4, -1)
-1 = -4/3 + c
-3/3 + 4/3 = c
c = 1/3
Hence the equation of the perpendicular line would be:
y = -x/3 + 1/3
