If `4x-5y+33=0` and `20x-9y=107` are two lines of regression, then what are the value of `barx` and `bary` respectively?

If 4x - 5y + 33 = 0 and 20 x - 9y - 107 = 0 are two lines of regression, find the standard deviation of Y, the variance of x is 9.

If the two lines of regression are 2x-y-4=0 and 9x-2y-38=0 , then the means of x and y variates respectively are

If y = 5 - 2.8x and x = 3 – 0.5y be the regression lines ,then the value of b_(yx) is

If the line of regression of x on y is 3x + 2y - 5 = 0 , then the value of b_(xy) is

If the two lines of regression are 3x - 2y+1 = 0 and 2x -y-2=0 , then bar x+bary is equal to:

If the two means of regression are 4x+3y+7=0 and 3x+4y+8=0, then find the means of x and y.