Help needed working out formula from data table
I'd be grateful if anyone is able to point me in the right direction or help me work out a formula based on a data table and it's inputs please.
There are only two inputs to generate the numbers, and the inputs and results are shown in the table below:
5.0% 0.429 0.347 0.287
7.5% 0.890 0.720 0.596
10.0% 1.494 1.209 1.000
12.5% 2.233 1.806 1.494
15.0% 3.100 2.508 2.075
17.5% 4.092 3.310 2.738
20.0% 5.203 4.209 3.482
Sorry I haven't been able to create a table here, so have formatted it as best I can. Please let me know if I can provide any more information to assist with this.
Some more info to help work out variables
Im a friend of ghelliwell's (who posted the orginal post).
The table is based on a formula in Richard Simmons' book "Buffett step-by-step. an Investor's workbook. Unfortunately we haven't been able to lay our hands on the book to see what the formula is.
I've attached a screen pic of part of the table, if that helps.
Simple explanation of 2 variable quadratic equation
Doesn't look like anyone has noticed my previous post. Can someone please explain what a 2 variable quadratic equation is? I need to find the formula for a curve.
I have the following x, y co-ordinates