Question

A, B and C have coordinates ( 2 , 9 ) , ( 10 , − 7 ) and ( 6 , p ) respectively. Line AB is perpendicular to line BC . Then the value of p is​

Answer 1

Answer:

-9

Step-by-step explanation:

slope of AB= -2

slope of BC= p+7/-4

Two non-vertical lines l1 and l2 are

perpendicular if and only if m1m2 = -1

Therefore, slope of BC =1/2

1/2= p+7/-4

p=-9