Question

What is the mid point of (1,-7) and (-1,-23)

Answer 1

let x=(1,-7)=(x1,y1)
     y=(-1,-23)=(x2,y2)
let p be the midpoint 
using midpoint formula,
p=(x1+x2/2) , (y1+y2/2)
   =(1-1/2), (-7-23/2)
    =(0/2), (-30/2)
   =0, -15
the coordinates of the midpoint are(0, -15)