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A sample of size n = $50$ was taken of two variable, quantitative data. A scatterplot of the two variables ($X$ and $Y$) shows a moderate, negative relationship between these variables.
One can conclude that
Variable $X$ causes change in variable $Y$.
Variable $Y$ causes change in variable $X$.
As $X$ increases, $Y$ tends to increase.
As $X$ increases, $Y$ tends to decrease.
Nothing since the relationship is moderate, not strong.