The given equation can be put in the form y = -(1/3)x + 9.
We see that the slope of the given line is -1/3.
Since the slope of the perpendicular line is the negative reciprocal of the given line, our slope is 3.
Using the point-slope form, an equation of the desired line is y - 6 = 3(x - 1)
So, y = 3x + 3