Answer:
c) 
Step-by-step explanation:
Equation for regression line of y on x is given as

where
= predicted value
m = slope of line
b = intercept
m and b are found as

r = correlation coefficient = 0.88
Sx = standard deviation for independent variable x = 13
Sy = standard deviation for dependent variable y = 27
= mean value of independent variable x = 21
= mean value of dependent variable y = 55
Substituting these values in (2) and (3)


Putting these values of m and b in (1)

Your answer is C hope this helps
1) 7 hours and 33 minutes
2) 28
3) y = 7
4) a times a times a times a
Answer: (C) $104
<u>Step-by-step explanation:</u>
The Annual Expenses are:
- Car Insurance = $850
- <u> Books </u>= <u>$400 </u>
Total = $1250
There are 12 months in a year so divide the Annual Expense by 12:
<u> 1 0 4</u>
12 ) 1250
<u> -12↓↓ </u>
5↓
<u> - 0↓ </u>
50
<u> - 48 </u>
2 ← The remainder is less than one-half so don't round up