(MPC and MPS) If consumption increases by $12 billion when real disposable income increases by $15 billion, what is the value of the MPC? What is the relationship between the MPC and the MPS? If the...

 (MPC and MPS) If consumption increases by $12 billion when real disposable income increases by $15 billion, what is the value of the MPC? What is the relationship between the MPC and the MPS? If the MPC increases, what must happen to the MPS? How is the MPC related to the consumption function? How is the MPS related to the saving function?