Question

If P(-1,1) is the midpoint of the line segment joining A(-3,b) and B(1, b+4) then b=?

(a) 1 (b) -1 (c) 2 (d) 0

Answer 1

The given ports are A(-3,b) and B(1, b+4)

$y=\frac{b+b+4}{2}1=\frac{2b+4}{2}1=b+2b=-1$

Option B