My Math Forum The annual increase I I in the deer population in a national park is ...............

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September 25th, 2017, 02:19 PM   #1
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The annual increase I I in the deer population in a national park is ...............

Hi People after a break I am trying for the second time to try and figure out more of this algebra So I hope it is okay that I post this question here? Or should I have posted it somewhere else? Is it possible for someone to tell me how I would answer the ones I missed or where to at least start? is it possible to solve these that I am missing with out a calculator?

The annual increase I in the deer population in a national park is given by the formula I = 1.2x − 0.0002x^2

Thanks for any help, hopefully I have not posted this question already since I always have so many questions.
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 September 25th, 2017, 05:48 PM #2 Senior Member     Joined: Sep 2015 From: USA Posts: 2,091 Thanks: 1087 Did you graph the growth formula? For (e) you're simply looking for the number of deer that makes the growth curve a maximum. You can just eyeball it from the graph to be 3000. and for (f) again you just eyeball it from the graph or plug 3000 into the growth formula to get 1800.
September 26th, 2017, 01:02 PM   #3
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Quote:
 Originally Posted by romsek Did you graph the growth formula? For (e) you're simply looking for the number of deer that makes the growth curve a maximum. You can just eyeball it from the graph to be 3000. and for (f) again you just eyeball it from the graph or plug 3000 into the growth formula to get 1800.
Hey romsek I did not as I think I was told I need to use a calculator and or Im unsure how I would draw it as would it be 0, 500, 1000, etc for x but what would my y's be? I was hoping I could have put a number somewhere in the formula to have solved for the answers...

September 26th, 2017, 02:11 PM   #4
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Quote:
 Originally Posted by GIjoefan1976 Hey romsek I did not as I think I was told I need to use a calculator and or Im unsure how I would draw it as would it be 0, 500, 1000, etc for x but what would my y's be? I was hoping I could have put a number somewhere in the formula to have solved for the answers...
(c) pretty clearly says use your calculator to graph the thing.

If you have to graph it by hand you just have to evaluate the growth formula at a selection of points like you say above. You have to plug those $x's$ into the formula and evaluate it to get the $y's$

That's not going to necessarily show you what the minimum is. Which is why they tell you to use a graphing calculator.

September 26th, 2017, 02:23 PM   #5
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Quote:
 Originally Posted by romsek (c) pretty clearly says use your calculator to graph the thing. If you have to graph it by hand you just have to evaluate the growth formula at a selection of points like you say above. You have to plug those $x's$ into the formula and evaluate it to get the $y's$ That's not going to necessarily show you what the minimum is. Which is why they tell you to use a graphing calculator.
okay Thank you...I will ask in class then how to do that on the calculator Thanks again for your help!

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