Question

Person BMI Total Cholesterol

1 20 157.87
2 22 170.85
3 24 183.83
4 26 196.81
5 28 209.79
6 30 222.77
7 32 235.75


Total Cholesterol and BMI were measured several individuals.
Using the regression line, what is the expected total cholesterol if a person has a BMI of 35?
A) 249.45
B) 253.21
C) 255.22
D) 257.43

Answer 1

The total is 255.22. The answer is C.

Answer 2

By using the arithmetic sequence, the difference between every other age is 12.98 (interval is 2). Example: 20 and 22 has 157.87 and 170.85 respectively which has the mentioned difference. Hence, if we calculate for the person who has a BMI of 35, then we add 12.98 to 235.75 plus the half which is 6.49. The total is 255.22. The answer is C.