Which equation is Perpendicular to y=3x−7 and goes through the point (9, -1)

y = −13x+2

y =−13x+1

y = −13x+3

y = −13x+4

Is none of the above an option? After solving, and graphing the equations none of these are perpendicular to the original, or first, line. After messing around a little the equation would have to be closer too y=-x+-6 and that's still not perfect. Sorry I couldn't be of more help.