The domain of a function is basically all the values where x is defined, and by defined, it means it has a y value corresponding to it. In this graph, x is defined from -5 to 5. If you look outside this range of numbers (from -5 to 5 on the x-axis) you will not find any y values for them. We can easily say the solution is A.
<u>Solution:</u>
[A]
<em><u>Note</u></em>: From what I see from the picture -5 and 5 are included in the domain, either the question is incorrectly written, or the picture isn't clear enough. If so, the answer should be .
I think the answer is 2 weeks 6 days because if over the course of 2 weeks they took 12 I ready quizzes the he needs 18 quizzes and it leaves 1 day extra