When all the points in a scatter plot lie directly on the regression line of Y and X, then
A) X has caused Y
B) the correlation must equal 0
C) the correlation cannot be calculated
D) the correlation must equal +1.00

Question

Quizplus · Accepted Answer

When all points lie on the regression line, it means that there is a perfect linear relationship between X and Y. In this case, the correlation coefficient must be +1.00 as there is a perfect positive correlation between X and Y.

When All the Points in a Scatter Plot Lie Directly