There is a weak positive linear association between numerical variables X and Y, where X ranges from 0 to 5 (inclusive). Based on the data from X and Y , the regression line is given by the equation Y' = 0.25X + 2. Which of the following statements must be true? Select all that apply. The correlation coefficient is 0.25. The equation corresponds to a non-deterministic relationship between X and Y. We can obtain the exact value of Y when X = 4. The predicted average value of Y is 4 when X = 8.You are given that the variables X and Y are negatively correlated. Which of the following statements must be true? Select all that apply. If we add 6 to each value of X and subtract 3 from each value of Y, the correlation coefficient does not change. The gradient of the regression line for Y vs X is the same as the gradient of the regression line for X vs Y. If we multiply all the values of X and Y by -1, then the correlation coefficient between X and Y will change. If we remove an outlier from the data set, the correlation coefficient will change. C If there are only 2 points, the correlation coefficient between X and Y must be -1