Find the equations of two lines of regression for the data:

And hence find an estimate of variable Y for X = 3.5 from the appropriate line of regression.

The two lines of regression meet at

Can the two lines of regression be parallel?

The two line of regression are perpendicular if

Find the equation of lines regression from the following data : Correlation of coefficient = (2)/(3)

Find the equation of the line, whose : x-intercept = 5 and y-intercept = 3

Find the line of regression of y on x from the following table : Hence estimate the value of y when x=6.

If the line of regression on x on y is 40x - 18y = 214 , then estimate the value of x when y=3

The two lines of regression are x+ 2y- 5= 0 and 2x + 3y - 8=0 and the variance of x is 12. Find the variance of y and the coefficient of correlation.

Find the equations of the two lines of regression for the following observations : (3, 6), (4, 5), (5, 4), (6,3), (7,2). Find the estimation of y for x = 2.5.

If the angle between two lines regression is 90^(@) , then it represents