P is equal to negative one
Answer:
you didn't put how many cookie are in one package
Step-by-step explanation:
sorry
Answer:

Step-by-step explanation:
Given
Represent the months with x and the earnings with y.
So:


Required
Determine the linear function
First, calculate slope (m)




The equation is then calculated using:




As a function, we have:

We cannot calculate the confidence interval without the sample size. However, for the second question, the sample size needed would be 49.
The formula we use is

To find the z-score:
Convert 98% to a decimal: 0.98
Subtract from 1: 1-0.98 = 0.02
Divide by 2: 0.02/2 = 0.01
Subtract from 1: 1-0.01 = 0.99
Using a z-table (http://www.z-table.com) we see that this value is closest to a z-score of 2.33.
Using the z-score, our standard deviation (9) and our margin of error (3), we have: