<p>I was taking the practice test in the Blue Book and got stumped by one problem (it's not even a "Hard" one..). It's one with a graph so I can't type out the question. It's number 13 on page 614. Can someone please explain how to solve this? I appreciate it!</p>
<p>Look here:
<a href=“http://talk.collegeconfidential.com/sat-preparation/339734-consolidated-list-blue-book-math-solutions-3rd-ed.html[/url]”>http://talk.collegeconfidential.com/sat-preparation/339734-consolidated-list-blue-book-math-solutions-3rd-ed.html</a>
614 / 13 / Blue Book Math Problem pg 614 #13</p>
<p>Since g(x) = y and g(2) = k, therefore when x=2, y=k you look at the value of y on the graph when x=2, you find 5. Hence, k=5. Now calculate g(5): For x=5, y=?
You look at the graph and find that y = 2.5.
Therefore, g(k)=2.5</p>
<p>Oh wow it’s that easy? Thanks.</p>