Question

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

Answer 1

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)