Which of the following indicates a positive correlation?

A positive correlation is indicated by a correlation coefficient that is a plus number. In statistical terms, correlation coefficients range from -1 to +1, where values closer to +1 represent a strong positive correlation. This means that as one variable increases, the other variable tends to also increase. For instance, a correlation coefficient of +0.75 indicates a strong positive relationship between the two variables being examined.

Other options do not reflect a positive correlation; a negative number suggests a negative correlation, meaning one variable increases as the other decreases. A correlation coefficient of zero indicates no relationship between the two variables, while a coefficient that is closer to zero, whether negative or positive, implies a weak or no correlation. Thus, the presence of a plus number clearly demonstrates a positive correlation, adhering to the established definitions in statistical analysis.