
Michael M. answered 09/04/21
Math, Chem, Physics, Tutoring with Michael ("800" SAT math)
First, find the slope of the tangent line that goes through (-6, 0)
This is the slope of the tangent at x= -6 or f '(6)
Once you get f '(6), take the negated reciprocal of that.
That will give you the slope of the perpendicular line.
You have a slope of the perpendicular line and a point that lies on it.
So to get the equation use the point-slope form of a line