The domain of a function is the complete set of possible values of the independent variable (input values).
The range of a function is the complete set of all possible resulting values of the dependent variable (y, usually), after we have substituted the domain (output values).
For the function {(2,5), (3,8), (4,11)} you have:
- the domain is {2,3,4};
- the range is {5,8,11}.
In other words, the function {(2,5), (3,8), (4,11)} can be written as
The values 2, 3, 4 are input values (the domain) and values 5, 8, 11 are output values (the range).
Answer: the range is {5,8,11}
