Domains and Absolute Value?

<p>Finishing up my reviewing tomorrow, and on the FRQ 2006:
<a href=“College Board - SAT, AP, College Search and Admission Tools”>College Board - SAT, AP, College Search and Admission Tools;

<p>On Number 5 B), I don’t really understand how the Domain works out :/</p>

<p>Oh, and another thing is, when is a good time to plug in the (-1, 1) to find the Constant (in this case K)? Just after all the crazy is over, or can it be whenever? When is a “good” time?</p>

<p>Well now it’s too late, I’m just going to get that 5 tomorrow :D</p>