Answer:
So the mid-point is (10.5,2)
Explanation:
By using mid-point formula
M(x,y)=(x1+x2)/2,(y1+2)/2
Putting the values of the coordinates
M(x,y)=(6+15)/2,(-4+8)/2
M(x,y)=21/2,4/2
M(x,y)=10.5,2
So the mi-point is (10.5,3)
I hope this will help you :)