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Year 2 Stats A Level Maths Question

https://www.quora.com/profile/Bravewarrior/p-155258163
Here is the question with its solution. I am stuck on part d. I don't know how they got their values for a and b? Some help would be greatly appreciated!
(edited 3 months ago)
Reply 1
Original post by pigeonwarrior
https://www.quora.com/profile/Bravewarrior/p-155258163
Here is the question with its solution. I am stuck on part d. I don't know how they got their values for a and b? And is it in the form y=ax^n or y=kb^x? Some help would be greatly appreciated!
Presuming the model is of the form
P = ab^T
so when you take logs of the model and data, you should be able to relate a and b (or log(a) and log(b)) to the coefficients of a standard linear model between T and log(P)?
Original post by mqb2766
Presuming the model is of the form
P = ab^T
so when you take logs of the model and data, you should be able to relate a and b (or log(a) and log(b)) to the coefficients of a standard linear model between T and log(P)?
After applying logs to both sides of P=ab^T I got logP= loga + Tlogb. In terms of comparing coefficients, I guess logb is the gradient and loga is the y-intercept? After assuming the linear model is logP= mT + C?
(edited 3 months ago)
Reply 3
Original post by pigeonwarrior
After applying logs to both sides of P=ab^T I got logP= loga + Tlogb. In terms of comparing coefficients, I guess logb is the gradient and loga is the y-intercept? After assuming the linear model is logP= mT + C?
Thats right.
Original post by mqb2766
Thats right.

Thank you so much!!! 🙂

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