What range indicates a perfect positive correlation?

A perfect positive correlation is indicated by a correlation coefficient of +1.00. This means that as one variable increases, the other variable also increases in perfect proportion. The range of correlation coefficients spans from -1.00 to +1.00, where -1.00 represents a perfect negative correlation, 0.00 indicates no correlation, and +1.00 signifies a perfect positive correlation. The presence of both negative and positive values highlights the full spectrum of correlation strengths. Thus, the correct answer identifies the entire range within which perfect positive correlation is situated, confirming that +1.00 is indeed the upper limit for this type of correlation.