<p>in ch 8 section 8 the guide talks about being careful with the range when you eliminate the parameter</p>
<p>SparkNotes:</a> SAT Subject Test: Math Level 2: Parametric Equations</p>
<p>but i dont get where they are getting the limits on the range from</p>
<p>any help is greatly appreciated (test this sat!!!)</p>
<p>"Below is a graph of the parametric equations x = 3t – 2; y = –t + 4 for the range of values 0 ≤ t ≤ 3."</p>
<p>Completely arbitrary if that's what you are referring to.</p>
<p>Oh when you eliminate t, you get
y = 10/3 - x/3
So you might mistakenly plot y/x as a very long line. But x and y can't be every value, they'd only be the values of x and y that exist on the time interval.</p>
<p>So, your limits on x and y are determined by substituting the extreme values of t back into the equation relating x and t and y and t.</p>
<p>has anyone been taking there practice tests, and noticed that there are some errors in the answer explanations? i mean, some answers in the explanations aren't the ones marked correctly, its kind of weird.</p>
<p>with that being said, i got a 770. how close is spark notes to the real thing, i mean it seems accurate, but i have no idea.</p>
<p>It's similar to the real thing</p>
<p>yeah sparknotes def has some problems, even in the review questions at the end of each chapter</p>