what kind of relationship between X ndY is indicated ,if the points of the scattered diagram tend to cluster about
1. a straight line parallel to x axis
2. a straight line parallel to y axis
3. a straight line sloping upward
4 a straight sloping downward

Dear Student,

1. A straight line parallel to x-axis implies that value of Y does not change at all when the value of X changes. Thus there is no linear correlation between the variables.
2. ​ A straight line parallel to y-axis implies that value of X does not change at all when the value of Y changes. Thus there is no linear correlation between the variables.
3. A straight line sloping upward indicates positive correlation.
4. A straight line sloping downward indicates negative correlation.

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