<p>^My dad’s position is that “average change” is delta y over delta x (what the link says is “average rate of change”) and that “average rate of change” is the percent rate of change here: <a href=“http://www.math.vt.edu/people/mcquain/arc_25.pdf[/url]”>http://www.math.vt.edu/people/mcquain/arc_25.pdf</a></p>
<p>I hope he’s wrong, though.</p>
<p>Indeed, when the question asks “rate of change in pounds per person per year,” it indicates that the UNIT of the answer must be “pounds/person/year.” Therefore, there is NO WAY that CollegeBoard asks us to find percent change. They want a NUMBER. And hence, delta y/delta x (=1/4, do I remember it right?) is the right one.</p>
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<p>^delta y/delta x is 1/4. The way my dad sees it is this:</p>
<p>It’s looking for the rate of change of (pounds per person per year). If you change from 13 to 18 in 22 years, he thinks that it’s asking for how much (read what percent) it increases per year. </p>
<p>I hope I’m interpreting him correctly. I also hope he’s wrong.</p>
<p>He’s an economist and is viewing the problem as an economist. The problem is a math problem that needs to be viewed through the eyes of a mathematician. After all this is the math portion of the SAT, not the AP Econ exam. :)</p>
<p>90 degrees, if you understand this answer state the question.</p>
<p>What do you guys think the curve will be? 
</p>
<p>-1 = 790? 780? 770?</p>
<p>And if I only get a grid-in question wrong, it’d be the same as only getting 1 MC wrong since the penalty for getting MC wrong wouldn’t really apply to it since it’d be rounded up?</p>
<p>Yes 1 or 2 wrong is the same as 1 or 2 omits respectively because the penalty would not apply because it rounds up.</p>
<p>If the temperature of a coffee mug can be measured by y=70+20(.69)^m, what is the temperature of the mug when it is first placed on the table?</p>
<p>TBH, my sixth sense tells me the answer is 1/4. </p>
<p>And any1 know what 51/53 would be?</p>
<p>@ Protoslg;
Assuming m is was time then 90 degrees?</p>
<p>yes, i was answering animosty’s question</p>
<p>what would like 3 MC wrong 1 free response wrong and 1 skip be?</p>
<p>What would 3 omits be?</p>
<p>^Probably around 740 maybe 750.</p>
<p>Well, I put 1/2 and this was totally a mistake on my part. I remember the lowest value was 13 and the greatest 18 so the delta y was 5 but wasn’t each tick mark on x axis 2 year span? like 80, 82, and such
cuz i didn’t carefully read the per year part, I just counted how many tick marks there were (and there were 11 of them) and just did 5/11 which yields about 1/2… </p>
<p>ugh… I hope 1/2 is the correct answer</p>
<p>and As for the 3x/17 one, although I don’t remember the exact wording (whether x was restricted to a positive integer or just integer), I’m absolutely sure it is 17. because zero doesn’t fall in the category of either positive or negative. so if it did say just an “integer”, without indicating “negative” or “positive.” the answer could be some huge 123 digit number like -17^17. After all, as long as its negative, its smaller than zero isn’t it? so the exact wording must have been “some postiive integer” and out of all the positive integers, the smalleest that could make the fraction an integer is 17. because 17 is a prime number</p>
<p>what do you guys think a -2 would be?</p>
<p>sb remember what is the correct choice for the height12 x 6 trangle one?</p>
<p>If the temperature of a coffee mug can be measured by y=70+20(.69)^m, m representing the number of minutes since the mug was placed on the table. What is the temperature of the mug when it is first placed on the table?</p>
<p>What I did was y=70+20(.69)^0
y=70+20(1)=90</p>
<p>Can I get confirmation?</p>
<p>I remember one question asked for numbers from 32 to 39 that are divisible by 6. I got one. Did i misread this? I read a consolidated list that said the range was 32 to 49 not 32 to 39. If I misread this easy question…</p>