<p>yeah. i’m just mad at myself because i was rushing and missed that I supposedly had one x go with two different y’s… or so i’ve heard here</p>
<p>The answer to the function question would be II.
I had 2 y’s for the same x’s, and III was a constant (y=1/2)
No, you can’t just had a 0x to it and say it’s function of x</p>
<p>@emmaarfelt - I took 2 practice tests from a PR review book a friend gave me. I didn’t practice at all other than that (and reading the review book). I think I’m just used to going fast because in my BC Calc class my teacher gives us like 6 pages full of derivatives for a test, and we get 45 minutes. There are 2 scenarios: you finish and don’t get to check your work, or you don’t finish. That really helped me, I think.</p>
<p>There was a question where it had a list of #s and you just find the range right? Or am i just being paranoid</p>
<p>For the interquatile range that was what percentage of the whole range, can someone explain if I was right: you take the number in the middle out of concern, and you divide the set into two equal groups, find the middle number (not the median) of each group, subtract from each other, and divide that by the range of the whole set?</p>
<p>^^ I just put the data into my calc, made a box plot, found Q3 and Q1, subtracted them, and divided the result by the range of the data. If you got 31%, you were correct.</p>
<p>@hennebou…
we already settled that one.
it was II and III</p>
<p>Alright, to settle the function question once and for all: III was y=1/2. Which is equivalent to -1/2 + x^0. Plug in ANY x into the function, you get 1/2, always. And y=-1/2 + x^0 IS a function of x. The freaking function is y=f(x)=1/2.</p>
<p>Was it y as a function of x (f(y) = x) or x as a function of y (f(x)=y)? If it was x as a function of y, it was II and III. If it was y as a function of x, it was something else.</p>
<p>I think it’s the other way around. If it is asking for y function of x, it’s II and III but if it asks for x as functio of y, it’s a diff ans</p>
<p>And just making sure, there was a question aside from the interquartile range one where it JUST asked for the range? Right?</p>
<p>And just making sure, there was another question aside from the interquartile range one where it asked for just the range, right? 2 seperate questions</p>
<p>i don’t remember but maybe…</p>
<p>If it passes the vertical line test then it is a function. f(x)=1/2 is still a function. If you want, you can represent it as y=0x+(1/2), but that would be silly.</p>
<p>wait wasnt there a choice -1 < x + y < 0 i think i put that</p>
<p>For IQR Question was there also a choice of around 20 %</p>
<p>was there another question about -1 < x - y < 0 so x + y is also -1 < 0 < 1??? i d ont remember</p>
<p>x+y was less than -1 for that question.</p>
<p>Can I get into Columbia/Berkeley engineering with 780 in Maths 2 ?</p>
<p>The function question was DEFINITELY II and III. We’ve done millions of such questions in school. ‘Y as a function of x’ means something like f(x) = ax+b. (a linear example, it could be any expression in terms of x). Y is not a function of X only and ONLY when ONE pre-image (X value) has TWO distinct images (Y values). All the X values can have the same Y value, it still is a function as long as all the X values are different, i.e. each X value has only ONE image.</p>