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14. The function below models the correlation between the number of hours a plant is kept in sunlight (x) and the height (y), in mm, to which it grows: y = 4 + 2x. What does the y-intercept of this function represent?

A) The original height of the plant was 4 mm.
B) The original height of the plant was 2 mm.
C) The height of the plant increases by 2 mm for every hour of sunlight it receives.
D) The height of the plant increases by 4 mm for every hour of sunlight it receives.

16. The table below shows the values of y for different values of x:

x 7 8 9 10 11 12 13
y 3 5 7 9 10 13 14
The correlation coefficient for the data is 0.9976. Which statement is true about the data in the table?

A) There is a strong positive relationship between x and y.
B) There is a strong negative relationship between x and y.
C) There is a weak positive relationship between x and y.
D) There is a weak negative relationship between x and y.

10. Two groups of students were asked how far they lived from their school. The table below shows the distances in miles:

Group A (distance in miles) 1 1.5 3 3.2 2.8 1.5 1.8 2.5 2.2
Group B (distance in miles) 2 2.5 3.2 3 1.8 2.4 3 1.5 1.8
Which statement best compares the mean distances for the two groups?

A) It is equal for Group A and Group B.
B) It is greater for Group B than Group A.
C) Its value for Group A is double its value for Group B.
D) Its value for Group B is double its value for Group A

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