# Perfect Correlation

Perfect Correlation:

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

Perfect Positive Correlation:

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

Perfect Negative Correlation:

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