44. line a passes through points (5, 2) and (13, 6). line b is parallel to line a. line c is perpendicular to line b. what is the slope of line c? a. 2 b. 1/2 c. – 1/2 d. –2

Line A passes through points (5, 2) and (13, 6). Line B is parallel to Line A. Line C is perpendicular to Line B. What is the slope of Line C?
                                                               6-2         4
Line A and B both have the slope m = = = 1/2.
                                                               13-5        8 

Line C, being perpend. to lines A and B, must have the slope m = -2 (answer)