Question 578760
perpendicular means you can swap the x and y coefficients and change one of the signs


9x + 2y = ?


to find the new constant term, plug in the given point ___ 9(2) + 2(-9) = ? ___ 0 = ?


9x + 2y = 0


or, for those not comfortable with zero, ___ 2y = -9x ___ y = (-9/2)x