Which of the following correlation values is the strongest?

A+0.10

B-0.95

C+0.90

D-1.00 ✓ Correct

Correct answer: (D) -1.00

Explanation

A correlation of minus 1.00 is the strongest, being a perfect negative relationship.

Strength depends on absolute value, so the sign does not weaken it.

Plus 0.10 is very weak, showing almost no linear relationship.

Minus 0.95 is strong but still short of perfect.

Plus 0.90 is likewise strong yet below unity.

Only plus or minus 1.00 represents a perfect, exact linear correlation.

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