Question

what is the range of the function? a. {-2, 2, 3, 4} b. {3} c. {-2, 2, 3, 4, 9, 12} d. {3, 9, 12}

Explanation:

Step1: Recall the definition of range

The range of a function (represented as a mapping) is the set of all output values (the second oval in the diagram).

Step2: Identify the output values

Looking at the diagram, the output values (the ones in the right oval) are 3, 9, and 12. We list them as a set, removing duplicates (but here all are unique in the range set).

Answer:

D. {3, 9, 12}