Gravity always acts downward on every object on earth. Gravity multiplied by the object's mass produces a force called weight. Although the force of an object's weight acts downward on every particle of the object, it is usually considered to act as a single force through its balance point, or center of gravity.
Integers between -4 and 0 are : -3, -2, and -1
(0,0), (1,1)
Basically, any point that is shaded.
