Answer:
a. f(x)=25+0.02x
b. 0 miles
Explanation:
The charges per week to rent a car =$25
There is an additional cost of $0.02 per mile.
Let the number of miles driven during the week = x
(a)The weekly cost, f o rent a car will be:
(b) If the weekly cost to rent the car was $25
f(x)=25
Substitution into f(x) derived above gives:
If the weekly cost was $25, the car was driven for 0 miles (was not driven at all).
Answer:
n=5
And in order to calculate the correlation coefficient we can use this formula:
So then the correlation coefficient would be r =0.9877
And the determination coefficient for this case would be:
And the correct option for this case would be:
A. The value of Upper R squared is 97.57%, which is the percentage of variance in Sales that can be accounted for by the regression of Sales on Number of Sales People working.
Step-by-step explanation:
The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.
For this case we have the following data:
N. sal. peop. work. Sales (in $1000)
2 10
3 12
6 14
8 15
10 17
10 19
11 19
16 23
17 23
20 25
We assume that the Number of Sales represent (X) and Sales (in $1000) represent (Y), we have this:
n=5
And in order to calculate the correlation coefficient we can use this formula:
So then the correlation coefficient would be r =0.9877
And the determination coefficient for this case would be:
And the correct option for this case would be:
A. The value of Upper R squared is 97.57%, which is the percentage of variance in Sales that can be accounted for by the regression of Sales on Number of Sales People working.