The x-coordinate of a point is known as its abscissa, while the y-coordinate of a point is known as its ordinate.
The given points are (2,−6) and (−2,8).
The ordinate of the point (2,−6) is −6, whereas the ordinate of the point (−2,8) is 8.
Similarly,
The abscissa of the point (2,−6) is 2, whereas the abscissa of the point (−2,8) is −2.
Sum of ordinates = −6+8=2.
Sum of abscissa = [2+(−2)=0].