Question 64737
y= -1/3x+9 The slope of this equation is -1/3.

The slopes of two lines which are perpendicular multiply to give -1 so the slope of the line perpendicular to this one multiplies by -1/3 to give -1. The new slope will be 3 because 3 x -1/3 = -1.

The new line passes through the point (-2,-2) so this gives you an x value (-2) and a y value (-2).
The form of the line is
y=mx + b (or some people use c)
The only value not known in the equation is the b so
-2=3*(-2)+b
-2=-6 + b
b=-2+6=4
so the new line will be y = 3x + 4