Usually it means that each of the variables is dependent on the other.
if one changes, so does the other.
"If coefficient of correlation, "r" between two variables is zero, does it mean that there is no relationship between the variables? Justify your answer".
there is a strong relationship between the variables
relationship between 2 variables
It is a linear relationship, such as y=mx+b.
In 2-dimensions, it is a relationship between two variables of the form ax + by + c = 0
A direct correlation, it appears as a straight line on a graph and occurs when variables are related as y=xk.
When a question asks you to state the relationship between variables, it is requesting you to describe how the variables are related to each other. This could include whether they have a positive or negative correlation, whether one variable causes a change in the other, or if there is no relationship between the variables.
it is a direct relationship -eli martin
It means that the relationship between the x and y variables is not linear.
There are no relations between different variables. If you want to enable a relationship between variables, you must write the code to implement that relationship. Encapsulating the variables within a class is the most obvious way of defining a relationship between variables.
eta
Correlation is a way of testing whether there is a linear relationship between two variables of their transformed versions. If there is no correlation then all that it means is that there is no linear relationship between the two or between their transformed versions. It certainly does not mean that there is no relationship. For example, if y = a*x^2 + b where a and b are constants then, because of symmetry, the correlation between x and y is 0.