Answer:
y = (-1/3)x + 5
Explanation:
the gradient of required equation (m2)
the gradient of given equation (m1) = 3
m1*m2 = -1 ( they are perpendicular)
3*m2 = -1
m2 = -1/3
required equation
y = m2 + c
( 9,2) satisfy the above equation
2 = (-1/3)*9 + c
c = 5
y = (-1/3)x + 5
