Someone who is smarter than me

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For the life of me I can't remember what this is called.  I believe there is a formula to represent it.

Lets say I have a range of numbers or steps

1 - 100

Each step adds value of 25

With an initial value of 50.

So
Step 1 = 50
Step 2 = 75
Step 3 = 100
Step 4 = 125
Step 5 = 150
And so on

What is that called? 

[Irish_Alley]

you mean like a "number sequence pattern"

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you mean like a "number sequence pattern"

YES!  Let try something. 

[Irish_Alley]

this might help

http://www.mathsisfun.com/numberpatterns.html

[Irish_Alley]

what are we going to try

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what are we going to try

Trying to write this in excel

[Irish_Alley]

write what

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I want to map this in excel, using the example in the OP

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This may be my answer.  Trying it meow.

http://www.get-digital-help.com/2010/01/24/create-number-sequences-in-excel-2007/

[1980c10]

If you need a formula
try this;
50+(25 x's (Step#-1)) = X

Substitute values as needed. If this is homework use proper symbols and letters to represent the equation.

[1980c10]

If you need a formula
try this;
50+(25 x's (Step#-1)) = X

Substitute values as needed. If this is homework use proper symbols and letters to represent the equation.

Ok still use this in the same format just reference cells where you enter your values with the "$" symbol

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Okay, I am closer, but here is the issue -
Using a growth trend I can quickly see that step 100 will equal 2525.  But now I need to show the total value spent per step.

50
75 =125
100 = 225
125 = 350
150 = 500
175 = 675

and so on.

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Its not homework, well sorta.  I want the values to project total time to total cost.  Sadly this is for game, I am trying to figure out based on a absolute income how much and how long it will take to achieve the goal; that is step 100.

It also doesn't help that I am fighting my ambien to figure this out 

[1980c10]

try to use a "linear" trend as this is a linear equation.
Or post back your formula and maybe someone can fix it.

[1980c10]

You also need to enter a "min" and "max" for 1-100 to be to get a n/a value outside of the parameters if you want to be technical about it, otherwise don't worry about it.