Possible to duplicate LOGEST() function in powerBI

Thanks for your response! I'm aware of all this, sorry if I wasn't clear. My desired output is the same output as the LOGEST() function in excel, i.e. the growth rate of an exponential curve fitted to an inputted list of known x and y values. I would be defining the VAR x_1 etc values within this measure purely for the purpose of calculating this output.

EDIT - in answer to where I get my VAR values from, I have one measure [COST] for which I have data over 5 years. I would set VAR y_1 equal to [COST] filtered to the first year, y_2 equal to [COST] filtered to the second year, etc. I have successfully done this to calculate other measure, eg year-over year change, linear trend, etc. The x_1, x_2, etc values would always be equal to 1,2,3,4,5. What I ultimately want to see is, for any given cut of the data, how the cost has been trending year over year using an exponential fit.

As a simplified example, if I input the following known x and y values to the LOGEST() function in excel, I get a growth rate of 2.402. What I'm wondering is if there's anything I can do in PowerBI with the same information to get the same output, or if I should just export my data to excel and work from there.

Growth = 

   VAR x_1 = 1

   VAR x_2 = 2

   VAR x_3 = 3

   VAR x_4 = 4

   VAR x_5 = 5

   VAR y_1 = 5

   VAR y_2 = 30

   VAR y_3 = 130

   VAR y_4 = 120

   VAR y_5 = 200

RETURN ???