F5: Calculating the learning rate

Do you understand the formula?

Y = a x (to the power of) b

It is far more common to look at learning as a way of finding the cumulative average time for producing a product.

b is the index of learning found by log of learning
................................................ log of 2


There is a short cut approach which is limited in terms of usefulness.
If you look at increased production along the lines of:
1
2
4
8
16

It works in this example, where you used an answer to try to understand what to do. (Not the approach I recommend)
You found the short cut being used.
The cumulative average time for 4 is going to be the time needed for the first x the learning rate twice

To go from 1 to 2 you multiply by the learning rate
To go from 2 to 4 you multiply by the learning rate again

In this case you know the Y value for 4 (22.71) and for 1 (30.00)
30 x the learning rate x the learning rate = 22.71
So 22.71/30 = learning rate x learning rate

So if you square root 22.71/30 that will give you the learning rate of 87%