The value of the correlation coefficient ranges from -1 to 1. The positive values indicate a positive correlation and the negative value indicates a negative correction.
The given correlation r = 0.79 is having a positive value. This means the two variables are positively correlated. Values closer to 1 indicate a strong correlation and the values closer to 0 indicate a weak correlation. A rule of thumb is, if the absolute value of correlation coefficient is greater than 0.65, it will be considered a strong correlation.
Since the value r = 0.79 is greater than 0.65. The correlation is strong.
Therefore, the correlation between the two variables is strong and positive.
So, the correct answer is option B