A (0, 9), B (1, 11), C (3, 13), and D (7, k) are four points. If AB is perpendicular to CD, then k = ?
Options:
1) 11
2) -5
3) 6
4) 7/2
Answer (2)
The value of k that makes line segment AB perpendicular to line segment CD is 11. This is determined by calculating the slopes of both lines and setting their product equal to -1. Therefore, the correct answer is option 1) 11.
;
** 1) 11** ;
