P (-4, b) and Q(2,b+2) are 2 points and the co-ordinates of the middle point of PQ are (-2,2) .The value of b is
1
3
-2
-1
Correct Answer : A
The slope of the line Joining A (-4. 6) and B (5, 3) is
The points of intersection of the circle x2 +y2=34 and line y=5