When the amount of nutrients available increases, the plant's height also increases. Hence, the positive correlation between the height and nutrients concentration.
The existence of a relationship between two variables that move in the same direction is referred to as a positive correlation. When one variable decreases while the other increases, or when one variable increases while the other decreases, there is a positive correlation.
A positive correlation exists when two variables tend to move in the same direction. For example, when one variable tends to decrease as the other variable decreases, or when one variable tends to increase as the other increases, there is a positive correlation.
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