Answer:
53x - 4 = 30
53x = 30 +4
53x = 34
x= 34/53
I don't see a answer that matches the answer to the problem that you stated. Check problem.
Step-by-step explanation:
I will attach google sheet that I used to find regression equation.
We can see that linear fit does work, but the polynomial fit is much better.
We can see that R squared for polynomial fit is higher than R squared for the linear fit. This tells us that polynomials fit approximates our dataset better.
This is the polynomial fit equation:

I used h to denote hours. Our prediction of temperature for the sixth hour would be:

Here is a link to the spreadsheet (
<span>https://docs.google.com/spreadsheets/d/17awPz5U8Kr-ZnAAtastV-bnvoKG5zZyL3rRFC9JqVjM/edit?usp=sharing)</span>
A. 4.898979486
b. 7.416198487
c. 8.544003745
i think at least
John sold 30U
Rick sold 25U
So, Rick sold 5 fewer units than John.
Hope that helps.