One-to-one: A function is said to be one-to-one if every y value has exactly one x value mapped onto it.
Many-to-one: If there are y values that have more than one x value mapped onto them.
One-to-many: If there are x values that have more than one y value mapped onto them. (NOT A FUNCTION)
Many-to-many: If there are x values that have more than one y value mapped onto them and at the same time, there are y values that have more than one x value mapped onto them (NOT A FUNCTION)
From all the ordered pairs, we find that the points (1,2) and (1,3) have the same x-value for diferent y-values. Also we find that the points (1,2) and (-2, 2) have different x-values for the same y-value.
Therefore, the ordered pairs DO NOT belong to a function and can be considered MANY-TO MANY.
