Question 432922
the equation of the perpendicular line must be 2x - 4y = c, where c is an unknown constant.  To find c, use the coordinates of the given point:
2*-1 -4*6 = c, or -2 - 24 = c, or c = -26.
Hence the equation of the perpendicular line is 2x - 4y = -26, or x - 2y = -13.