Domain & Range
Range
Examples
Example 1 What is the range of the function y = 4x -2 ?
Since the function is not modeling a situation, the range has no restrictions. The range of the function is all real numbers, in set notation 
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. Example 2 What is the range of the function f(t) =3t -4 , where t represents the time it takes to wash a car in minutes and f(t) represents the number of cars washed?
Since the range is modeling the number of cars, it will be restricted to numbers greater than or equal to 0 cars and will not be a fraction or decimal, in set notation 
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Example 3 What is the range of the function y = 4?
Since the graph of this function will always have the output value of 4, its range is the number 4, in set notation 
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