Final answer:
The correlational coefficient that represents the strongest relationship is 1.25.
Step-by-step explanation:
The correlational coefficient that represents the strongest relationship is d. 1.25.
The correlation coefficient measures the strength and direction of the relationship between two variables. The values range from -1 to +1, with a positive coefficient indicating a positive relationship and a negative coefficient indicating a negative relationship. The absolute value of the coefficient represents the strength of the relationship, with larger values indicating a stronger relationship. Therefore, the highest absolute value among the given options is 1.25, which represents the strongest relationship.