Answer:
y+3x+23=0
Step-by-step explanation:
From y = x/3 + 6 comparing with general equation of a line, y = mx +c
m1 = 1/3
Perpendicularity rule states that m1m2 = -1
m2 = -1/1/3 = -1 * 3/1 = -3
The equation is
y-y1 = m2(x-x1)
y-(-2) = -3(x-(-7))
y+2 = -3(x+7)
y+2 = -3x-21
y = -3x-21-2
y= -3x-23
y+3x = -23
y+3x+23=0
