Which of the following correlation coefficients represents the strongest relationship between two variables? a. + 0.30 b. + 0.75 c. + 1.3 d. - 0.85 e. - 0.05

Answer: d. - 0.85

Step-by-step explanation:

Since we know that,

The value of strong correlation coefficient r, lies between the absolute value of 0.75 to 1.

From all the given options (a. + 0.30 b. + 0.75 c. + 1.3 d. - 0.85 e. - 0.05),

The absolute value of - 0.85 (|-0.85|=0.85) is nearest to 1 among all.

(Note : Negative correlation coefficient mean there is negative association between the variables.)

Therefore, the correlation coefficient represents the strongest relationship between two variables is - 0.85.

Hence, the correct answer is d. - 0.85.