Assignment 2

course Mth 271

I'm not really sure what the second part was reffering to, if you could please give me some feedback I would be glad to complete the work properly.

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22:12:40

`qNote that there are four questions in this assignment.

`q001. Recall the stock value problem, where March, July and December values were $5000, $5300 and $5500.

Construct a graph of stock value vs. number of month (e.g., 1 for Jan, 2 for Feb, etc.). You will have three points on your graph, one corresponding to the March value, one to the July value, and one to the December value. Stock value will be on the y axis and month number on the x axis. Your first point, for example, will be (3, 5000), corresponding to $5000 in March.

Connect your three points with straight lines--i.e., connect the first point to the second and the second to the third.

What is the slope of your line between the first and second point, and what is the slope of your line between the second in the third point? Recall that slope is rise / run.

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RESPONSE -->

The slope of the points (3,5000) and (7, 5300) is 75

The slope of the points (7, 5300) and (12, 5500) is 40

confidence assessment: 3

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22:13:09

The three points on the graph are (3, 5000), (7, 5300) and (12, 5500).

The rise between the first point and the second is from 5000 to 5300, or 300, and the run is from 3 to 7, or 4, so the slope is 300 / 4 = 75. Note that the 300 represents $300 and the 4 represents 4 months, so the slope represents $300 / (4 months) = $75 / month, which is the average rate of change during the first time interval.

The rise between the second point and the third is from 5300 to 5500, or 200, and the run from 7 to 12 is 5, so the slope is 200 / 5 = 40. This slope represents the $40/month average rate of change during the second time interval. Click on 'Next Picture' to see the graph.

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RESPONSE -->

ok

self critique assessment: 3

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22:13:46

`q002. Look at your results for the slopes, and look the results for the average rates of change. What do you notice? In what way then does the graph represent the average rate of change?

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RESPONSE -->

The slopes and the average rate of change are the same.

confidence assessment: 3

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22:14:47

Stocks can do just about anything from day to day-they can go up or down more in a single day than their net change in a month or even a year. So based on the values several months apart we can't say anything about what happens from day to day or even from month to month. We can only say that on the average, from one time to another, the stocks changed at a certain rate.

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RESPONSE -->

I accidentally clicked on the next question so I'm not really sure what this was?

self critique assessment: 1

You should run back through the program to see what you missed. If you have questions or self-critiques, you are still welcome to submit them.

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22:15:57

`q004. From the given information, do you think you can accurately infer the detailed behavior of the stock values over the nine-month period?

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RESPONSE -->

Yes, you can see that the stock value is increasing throughout the period.

confidence assessment: 1

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22:16:24

Not on a day-to-day basis, and not even on a month-to-month basis. All we can see from the given information is what might be an average trend.

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RESPONSE -->

Ok, this makes sense.

self critique assessment: 2

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06-08-2008

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assignment #002

002. `Query 2

Applied Calculus I

06-08-2008

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22:38:51

What were temperature and time for the first, third and fifth data points (express as temp vs clock time ordered pairs)?

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RESPONSE -->

I'm not sure what this is referring to?

confidence assessment: 0

It appears that the program failed to stop at the end of query 1. Don't worry about this until you have completed subseqent assignments.

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See my notes and let me know if you have questions.