Question on correlation and regression

If u=2x+5 and v=-3y-6 and regression coefficient of y on x is 2.4 what is the regression coefficient of v on u?

A)3.6    B)-3.6 C)2.4  D)-2.4

Thanks in advance.

y = 2.4x + b now v = -3*(2.4x + b)-6 = -7.2x - 3b-6 = -7.2x - 18 -3b+12 = -3.6(2x+5) + 12-3b = -3.6u +12-3b so coefficient of regression of of v on u is -3.6

Thank you

U = 2x+5         C= 2/5                                               

V = 3y-6           d = - 6/3=-2

Vyx = 2.4           rvu = d/c*rxy

rvu = ?                     =-2/2/5 * 2.4

                                 =-2*5/2*2.4

                                 = -5*2.4

                                 = - 12.ans.