How do you find the domain and the range of the relation, and state whether or not the relation is a function (8,8), (9,9), (10,9), (10,10)?
The relation is NOT a function
The domain is the set of all x-values (input values)
The range is the set of all y-values (output values)
A function is a relation for which each value from the domain is associated with exactly one value of the range.
So, the relation is NOT a function because the x-value of 10 is associate with y-value of 10 and 9.