Find the coordinates of the midpoint of the line segment joining the points (2, 1) and (1, -3).
Let the midpoint be (x, y).
If (x, y) is the midpoint of the line joining the points (x1,y1) and (x2,y2) then
(x,y)=(x1+x22,y1+y22)
Here, (x1, y1)=(2,1),
(x2, y2)=(1,−3)
⇒(x,y)=(2+12,1+(−3)2)=(32,−1)
Therefore, coordinates of the midpoint of the line segment joining the points (2, 1) and (1, -3) are (32,−1).