<p>That wasn’t the rule… The rule stated that y>x^2, not y>x.</p>
<p>Everyone reading this thread should know that the issue at hand is whether or not the interior counts as including the y=x^2 and y=4 line and also whether or not that is an appropriate question to ask students whom are only expected to be knowledgeable in algebra II or lower.</p>
<p>interior means inside. the y=4 and y=x^2 inclusive would have been boundaries, not interior. </p>
<p>“In mathematics, the interior of a set S consists of all points which are intuitively “not on the edge of S”. A point which is in the interior of S is an interior point of S. The notion of interior is in many ways dual to the notion of closure.”</p>
<p>[Interior</a> (topology) - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Interior_(topology)]Interior”>Interior (topology) - Wikipedia)</p>
<p>I know it’s wikipedia, but it explains it well.</p>
<p>I’m still standing by my answer that interior is NOT including the lines/curves themselves.</p>
<p>I also asked my ap calc bc teacher to reconfirm and she agreed.</p>
<p>I think the answer is C- cannot be solved. :P</p>
<p>90% sure it was A</p>
<p>They said the word “interior” for a reason. To those who say “none”, do you expect an answer explanation(imagine you’re reading Collegeboard’s explanation) to say something like: The interior of the shaded region CLEARLY refers to the shaded region and the outside line. I’m not saying it’s right, but you should pick up some sort of awkwardness when the word interior has to be CLEARLY related to the line itself because each answer on the SAT has to be cogent.</p>