Answer :
Answer:
y = (4/3)x - 7
Step-by-step explanation:
For perpendicular lines,
m1×m2 = -1, where m1 and m2 are their gradients
m1 = -3/4
-3/4 × m2 = -1
m2 = 4/3
y = (4/3)x + c
When x = 12, y = 9
9 = (4/3)(12) + c
9 = 16 + c
c = -7
y = (4/3)x - 7