Question

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

Answer 1

Answer:

b is -1

Step-by-step explanation:

we know that p(x,y)=(x1+x2)/2. + (y1+y2)/2

p(-1,1) is mid point .

therefore. (-3+1 )/2 =-1 and (b+b+4 )/2 =1

(2b +4 )/2 =1

2(b+2)/2 =1

b+2 =1

b=1-2=-1