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Regression analysis problem: Determine the correlation coefficient and coefficient of determination for the following data. Interpret the relationship between X and Y.
X: 5 3 6 3 4 4 6 8
Y: 13 15 7 12 13 11 9 5
Correlation coefficient is _______________?
Coefficient of determination is _______________?
Interpretation:
Which of these functions is(are) always increasing?
(I) f(x) = -x2 + 2x + 1
(II) f(x) = 2x - 1000
(III) f(x) = |x - 4| + 255
(IV) f(x) = -e-x,
A) (I) and (II) only
B) (II) only
C) (II) and (IV) only
D) (I) and (III) only
E) (III) and (IV) only
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