Answer:
D: {-3, 1, 4, 8}
R: {-8, 1, 9, 13}
Explanation:
The domain is the list of the x-values: {-3, 1, 4, 8}.
The range is the list of the y-values: {-8, 1, 9, 13}.
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As you have noted, we like the elements of a set to be listed in order from smallest to largest. Repeated elements (if any) are listed only once.