# Perfect Correlation

Perfect Correlation

If there is any change in the value of one variable, the value of the other variable is changed in a fixed proportion. The correlation between them is said to be a perfect correlation. It is indicated numerically as $+ 1$ and $– 1$.

Perfect Positive Correlation

If the values of both the variables move in the same direction with a fixed proportion is called a perfect positive correlation. It is indicated numerically as $+ 1$.

Perfect Negative Correlation

If the values of both the variables move in opposite directions with a fixed proportion is called a perfect negative correlation. It is indicated numerically as $– 1$.