Line A passes through the points (−3,−1)(-3, -1)(−3,−1) and (−1,9)(-1, 9)(−1,9). Line B passes through the points (−2,1)(-2, 1)(−2,1) and (k,4)(k, 4)(k,4). Line A and Line B are perpendicular. Find the value of kkk.
