math question

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1

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<p>I have no clue how to do this :|</p>

<p>thanks!!</p>

2

<p>It’s 0.73</p>

<p>Take a few points and divide the dollars by the pounds. Add up the values and then divide the total value by the amount of points you used.</p>

3

<p>(Not sure if I’m correct, but this is how I would do it)</p>

<p>The straight line going through the points is basically a rough average of all the prices per pound. So the slope of this line should give me a number close to the actual average without having to work all the numbers out.</p>

<p>When x = 4, y = 3. So this tells me that 3/4 should be the average… 3/4 = .75
the closest answer is .73</p>

<p>However I have no clue if I’m right :D</p>

4

<p>i approximated all the values, divided by 10, and got 3.5 as the answer, but that isn’t an option! what do i do after I find the average?</p>

5

<p>Equation of Line of Best Fit found using (delta Y / delta x): y=.75x
Average cost estimate would thus be around $.75, and so I believe the answer is E (closest).</p>

<p>However, this problem does not represent the typical SAT I math problem. May I ask where you got this from?</p>

6

<p>@johnny, that seems pretty right! how exactly does the slope represent the average though? could you elaborate a bit more? thanks :)</p>

7

<p>@Cecilia87 What you did was estimate the average cost of the meat (regardless of weight). If you were set on estimating a “sum”, divide by the total number of pounds of meat to get in the ballpark. However, this would not get you a very accurate answer since you might end up caught between answers D and E</p>

8

<p>@chewydog, it’s from Dr. Chung’s SAT math book! i thought this question was strange as well :|</p>

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<p>@chewydog I got 3.5 for the average cost, I didn’t know what to do with this average after lol!</p>

10

<p>Having looked at your other posts, I recommend that you get another workbook. No offense, but the questions you posted look barely anything alike with real SAT I problems. Have you used the BB before?</p>

<p>You can’t do anything with the 3.5. It’s simply the estimated average price of meat (no weight involved). The reason why .75 (from the equation) is the average is because it is the slope of the line of best fit. Google linear regression for a better explanation.</p>

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<p>btw I have some more questions, if you guys could help :)</p>

<p><a href=“http://talk.collegeconfidential.com/sat-preparation/1294611-2-math-questions.html[/url]”>http://talk.collegeconfidential.com/sat-preparation/1294611-2-math-questions.html&lt;/a&gt;&lt;/p&gt;

<p>as you can see math is not my forte :)</p>