Scatter chart
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scatter chart
Sure. If you can observe that when variable A changed, variable B didn't change, and this happens repeatedly, that is a good indication that there is no relationship between those variables.
"If coefficient of correlation, "r" between two variables is zero, does it mean that there is no relationship between the variables? Justify your answer".
Line graph is used to show relationship between two variables.
A tentative descriptive statement of the relationship between the variables is called hypothesis