If two line are perpendicular. The multiply of their slopes are equal to -1. First line's slope is: -1/2x because if the line equation is form of y=ax+b a is slope. Let say second line's slope is m m.-1/2=-1 so m=2 y=ax+b is general form of linear function/equation. (a=slope) y=2x+b If this line passes through the point (2,-2),if we write -2 to y and 2 to x, the equation becomes true. -2=4+b b=-6 Thus, y=2x-6 is true answer.
