Questions
If the perpendicular bisector of the line segment joining and has y-intercept Then, a possible value of is
a
-2
b
-4
c
1
d
2
detailed solution
Correct option is B
The coordinates of the mid-point of PQ are k+12,72. Slope of PQ=4−31−k=11−k∴ Slope of the perpendicular bisector of PQ is (k -1).The equation of the perpendicular bisector of PQ, is y−72=(k−1)x−k+12It passes through (0, - 4)∴ −152=−k2−12⇒k=±4Talk to our academic expert!
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