1. 3rd one, because for each x there's only one y.
2. The domain are x's, so it's <span> {2, 4, 6, 8}
3. </span>The range are y's, so it's <span> {1, 2, 3, 4}
4.

5.</span>

6. <span>

7.

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Answer:
i may be wroung but it should be 90
Step-by-step explanation:
A scientific theory is a validated explanation of some aspect of the natural world, based on multiple facts that have been frequently verified through research and experimentation. Fact theories are not "guesses" but reliable accounts of the real world.
Answer: 1,045.50
Step-by-step explanation: hope this helps champ.