Blue Book 2nd Ed. Math question

<p>Practice Test 5, Section 8 Number 15. Can someone please help explain to me how to get the answer. Im not really liking the the College Board explanation on the site.
Also, same goes for number 16. Thanks</p>

<p>More of us can help if you would write the question. I don’t always have quick access to my blue book.</p>

<p>damn…i wish there was some tool on CC to draw figures and graphs :/</p>

<p>check this out::::
[SAT</a> Prep: Test 3 Section 8 Part 4 | Khan Academy](<a href=“Khan Academy”>Khan Academy)</p>