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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,691

Working on a new Investment/Loan Graph

Does it make sense? Does it do the calcs correctly? Any suggestions?

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hi MIF;

Very nice looking interface. So far it is doing everything correct.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

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**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,504

hi MathsIsFun,

I'm confused. Raw? PV NPV etc ?

I looked at your interest and compound interest pages and so I think PV means 'present value'.

But you used FV for 'future value', so what is NPV ?

And why is the 2000 negative ? Does that mean it is a loan rather than an investment ?

Maybe a key to the terminology is needed. (Well, it is for dummies like me )

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Sometimes I deliberately make mistakes, just to test you! …………….Bob Bundy

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**Mathegocart****Member**- Registered: 2012-04-29
- Posts: 2,018

MIF,nice graph.But you might need to put more info,Like what Bob said.Anyway great job

The integral of hope is reality.

May bobbym have a wonderful time in the pearly gates of heaven.

He will be sorely missed.

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,691

Thanks guys, will add explanations and links to relevant pages.

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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