Answer: -0.52
Explanation:
From the given scatter plot, it can be seen that there is a moderate negative correlation between the variables as variable X increases variable Y decreases.
i.e. the value of correlation coefficient must be negative.
Also, the value of weak correlation coefficient r, lies between the absolute value of 0.40 to 0.59.
From all the given options -0.52 is the value which is contained in interval 0.40 to 0.59 .
Therefore, the best estimate of the correlation coefficient for the variables in the scatter plot = -0.52