
RE: algebra regents 2011
Posted:
Jun 18, 2011 2:46 PM



So obvious the state looks to trick the kids.make it fair and you will not need the crazy curve
From: ownernyshsmath@mathforum.org [mailto:ownernyshsmath@mathforum.org] On Behalf Of TKENYON@crcs.wnyric.org Sent: Friday, June 17, 2011 5:19 PM To: nyshsmath@mathforum.org Subject: Re: algebra regents 2011
It doesn't matter which variable is graphed on the independent axis, and I think most people DID put the cost as the independent variable. I think the mistake you're making is that when you put cost on the xaxis, as cost decreases, you're going from left to right, not right to left. Simply, as one goes up, the other goes down. In a positive correlation, as one goes up, the other goes up.
The only question I didn't really like was the average speed question. First, that concept (not to average the averages) is challenging for some students in physics, let alone algebra 1 students. But what particularly bothered me is that the distance and speed are pretty unrealistic to any of our students who do a lot of hiking. (And a lot of my students in the past have been avid hikers; one former student (and former member of our backpacking club  yes, we have hikers) recently completed an around the U.S. hike.) It's like "A hiker" is in the same way that "A biker" is Lance Armstrong, or "A guy driving a car" is Dale Earnhardt.
Tom Kenyon CRCS Mathematics/Physics tkenyon@crcs.wnyric.org
ownernyshsmath@mathforum.org wrote: 
To: nyshsmath@mathforum.org From: Vera Sinnreich Sent by: ownernyshsmath@mathforum.org Date: 06/17/2011 03:06PM Subject: Re: algebra regents 2011
I found question 22 poorly worded and ambiguous. The independent variable could be the cost (I think they meant "the price") of carrots, in which case choice 2 would be the correct response. Had the problem stated that "a study showed that DECREASING the price of ..." this would be a fair assumption. However, in "A DECREASE in the cost of ...", the decrease itself is the subject and, thus, the variable being discussed. In this case, the correct response would be choice 1.
I am fairly certain that the author of this question had the first scenario in mind and, this scenario being the more conventional one, that most people reading this question , students and teachers alike, will read it in that way. But we cannot insist on precise mathematical language in our students' communication unless we are willing to hold ourselves accountable to the same standards. And the second interpretation is linguistically more appropriate. Thus, in my humble opinion, both answers should be accepted as correct.
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