Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

How do I use Excel to calculate a trend (x, y coordinates)?

Posted on 2014-01-12
2
Medium Priority
?
269 Views
Last Modified: 2014-01-12
How do I use Excel to calculate the missing value in the data table below indicated by question marks?

Date:               4/1/2005                                  9/15/2009                                          7/31/2013
Amount:             $22,918.80                                   $13,000.00                                              ???????
Comments:      Purchased New       Appraised by Otts Farm Equipment                        Excel
0
Comment
Question by:bobbat
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
2 Comments
 
LVL 23

Expert Comment

by:Danny Child
ID: 39775459
This should do it... I'll explain below.
EE---linear-trend.xlsx
0
 
LVL 23

Accepted Solution

by:
Danny Child earned 2000 total points
ID: 39775470
As I understand it, the items concerned have lost a fixed price per day since their purchase, and you want to extend this trend to the new date.

So, for the loss per day, it's just
(PurchasePrice - 1stAppraisalPrice) / (1stAppraisalDate - PurchaseDate)

And therefore the loss at the 2nd date is
LossPerDay * (2ndAppraisalDate - PurchaseDate)

and the overall remaining value is
PurchasePrice - LossToDate

The attached table does all this in one hit, and the benefit of making it a table is that it makes the (admittedly complex) formula a bit more readable.

I added the 2nd row as a simple test of the maths.
If an item loses 200 in 10 days, it should lose 600 in 30 days... which it does.
note, with the dates, to get a 10 day gap, you have to specify the 1st and the 11th of the month, not the 10th...

Hope this is what you're after!
cheers, Danny
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Freeze panes is an option within all variants of Excel to enable parts of a sheet to remain stationary when the cursor is in another part of the sheet. This is a very useful feature which is overlooked or under used.
How to get Spreadsheet Compare 2016 working with the 64 bit version of Office 2016
This Micro Tutorial will demonstrate in Google Sheets how to use the HYPERLINK function to create live links inside your spreadsheet.
Many functions in Excel can make decisions. The most simple of these is the IF function: it returns a value depending on whether a condition you describe is true or false. Once you get the hang of using the IF function, you will find it easier to us…

618 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question