The scatter plot shows the relationship between the dverdye study each week.
Test Scores vs. Hours Studied
y
100
90
80
70
Average Test Score
60
50
40
30
>
0
1
6
3
5
Hours Studied
The y-intercept of the estimated line of best fit is (0, b).
Enter the approximate value of b in the first response box.

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.