SOLUTION: x 0 1 2 3 y 1.9, 6.2, 18.0, 54.2 Calculate, using regression, the y-value for x = 4 rounded to 2 decimal places

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Question 1177169: x 0 1 2 3
y 1.9, 6.2, 18.0, 54.2
Calculate, using regression, the y-value for x = 4 rounded to 2 decimal places


Found 2 solutions by greenestamps, ikleyn:
Answer by greenestamps(13198)   (Show Source): You can put this solution on YOUR website!


You need to specify the kind of regression....

It's obviously not linear. But it might be quadratic, or exponential, or even cubic. Different types of regression will predict different values for x=4.

Re-post, specifying the type of regression.
Answer by ikleyn(52776)   (Show Source): You can put this solution on YOUR website!
.

Look into sequential ratios


    6.2 : 1.9     is about 3;


    18.0 : 6.2    is about 3;


    54.2 : 18.0   is about 3.


It tells you that the regression is (or should be; or you can expect it) an exponential function.


So, go to GOOGLE and ask about "exponential regression online calculator".


GOOGLE will return you many links to relevant web-sites.


Take anyone you like more than others.


For example, consider this one


https://keisan.casio.com/exec/system/14059930973581



Input your data; press the  "SOLVE"  button and get the result: the required formula and even a plot.


Goof luck and have happy and pleasant exercises.



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