Domain & Range: Examples

Domain & Range

Example 1 What is the domain of the function y = 4x -2 ?

Since the function is not modeling a situation, the domain has no restrictions. The domain of the function is all real numbers, in set notation .

Example 2 What is the domain of the function f(t) = 3t - 4 , where t represents the time it takes to wash a car in minutes?

Since the domain is modeling time, it will be restricted to numbers greater than or equal to 0 minutes, in set notation .